GST TELECOMMUNICATIONS INC
F-2/A, 1996-05-10
RADIOTELEPHONE COMMUNICATIONS
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      As filed with the Securities and Exchange Commission on May 10, 1996
    
                                                       Registration No. 333-2266

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                      ------------------------------------

   
                                 AMENDMENT NO. 2
    
                                       TO
                                    FORM F-2
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                      ------------------------------------

                                  GST USA, INC.
                          GST TELECOMMUNICATIONS, INC.
           (Exact name of Registrants as specified in their charters)

                                 Not Applicable
                 (Translation of Registrants' Name into English)

     DELAWARE                                         83-0310464
      CANADA                                         NOT APPLICABLE
(State or other jurisdiction                       (I.R.S. Employer
 of incorporation or organization)                  Identification No.)

       GST USA, INC.                         GST TELECOMMUNICATIONS, INC.
   4317 N.E. THURSTON WAY                    1030-999 WEST HASTINGS STREET
VANCOUVER, WASHINGTON 98662               VANCOUVER, BRITISH COLUMBIA V6C 2W2
       (360) 254-4700                               (604) 688-0553
   (Address and telephone number of registrants' principal executive offices)

                      ------------------------------------

                                ROBERT H. HANSON
                                  GST USA, INC.
                          GST TELECOMMUNICATIONS, INC.
                SENIOR VICE PRESIDENT AND CHIEF FINANCIAL OFFICER
                              1285 SHERIDAN AVENUE
                                    SUITE 245
                               CODY, WYOMING 82414
                                 (307) 527-6048
    (Name, address and telephone number of agent for service for registrants)

                      ------------------------------------

                                    Copy to:

                                  STEPHEN IRWIN
                     OLSHAN GRUNDMAN FROME & ROSENZWEIG LLP
                                 505 PARK AVENUE
                            NEW YORK, NEW YORK 10022
                                 (212) 753-7200

                      ------------------------------------

         APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED EXCHANGE OFFER: As soon as
practicable after this Registration Statement becomes effective.

         If the only securities being registered on this Form are to be offered
pursuant to dividend or interest reinvestment plans, please check the following
box. / /

         If any of the securities being registered on this Form are to be
offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933, check the following box. / /

         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. / /

         If this Form is a post-effective amendment filed pursuant to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the same offering. / /

<PAGE>
         If delivery of the  prospectus  is expected to be made pursuant to Rule
434, please check the following box. / /

   
         THE REGISTRANTS  HEREBY AMEND THIS REGISTRATION  STATEMENT ON SUCH DATE
OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE  DATE UNTIL THE  REGISTRANTS
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY  STATES THAT THIS REGISTRATION
STATEMENT SHALL  THEREAFTER  BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE  SECURITIES  ACT OF 1933 OR UNTIL THE  REGISTRATION  STATEMENT  SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION,  ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
    

<PAGE>
                                  GST USA, INC.
                          GST TELECOMMUNICATIONS, INC.

                              CROSS REFERENCE SHEET

              PURSUANT TO ITEM 501(B) OF REGULATION S-K SHOWING THE
                  LOCATION OF INFORMATION REQUIRED BY PART I OF
                                    FORM F-2
<TABLE>
<CAPTION>
Item No.         Caption                                             Location or Caption in Prospectus
- --------         -------                                             ---------------------------------
<S>              <C>                                                 <C>
Item 1           Forepart of Registration Statement and              Outside Front Cover Page
                 Outside Front Cover Page of Prospectus

Item 2           Inside Front and Outside Back Cover Pages           Inside Front Cover Page; Back Cover Page;
                 of Prospectus                                       Available Information; Incorporation by
                                                                     Reference, Risk Factors

Item 3           Summary Information, Risk Factors and               Prospectus Summary; Risk Factors; Deficiency
                 Ratio of Earnings to Fixed Charges                  in Earnings to Cover Fixed Charges

Item 4           Use of Proceeds                                     Use of Proceeds

Item 5           Determination of Offering Price                     Not Applicable

Item 6           Dilution                                            Not Applicable

Item 7           Selling Securityholders                             Not Applicable

Item 8           Plan of Distribution                                Plan of Distribution

Item 9           Description of Securities to be Registered          The Exchange Offer; Description of the New
                                                                     Notes; Certain United States Federal Income
                                                                     Tax Considerations

Item 10          Interests of Named Experts and Counsel              Legal Matters; Experts

Item 11          Material Changes                                    Material Changes

Item 12          Information with Respect to the Registrants         Prospectus Summary; Risk Factors; Material
                                                                     Changes; Description of the New Notes;
                                                                     Financial Statements

Item 13           Disclosure of Commission Position on               Not Applicable
                 Indemnification for Securities Act Liabilities
</TABLE>

<PAGE>
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO BUY NOR SHALL THERE
BE ANY SALE OF THESE SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION
OR SALE WOULD BE UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE
SECURITIES LAWS OF ANY SUCH STATE.

PROSPECTUS (Subject to Completion)

                                OFFER TO EXCHANGE
                 13 7/8% SENIOR DISCOUNT EXCHANGE NOTES DUE 2005
                                       FOR
                                 ALL OUTSTANDING
                      13 7/8% SENIOR DISCOUNT NOTES DUE 2005
                    ($163,616,520 ACCRETED VALUE OUTSTANDING)

                                       OF

                                  GST USA, INC.

                 UNCONDITIONALLY GUARANTEED ON A SENIOR BASIS BY

                          GST TELECOMMUNICATIONS, INC.

                               THE EXCHANGE OFFER
                  WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME
                     ON __________ __, 1996, UNLESS EXTENDED

                                 --------------

         SEE "RISK FACTORS" IMMEDIATELY FOLLOWING THE PROSPECTUS SUMMARY FOR A
DISCUSSION OF CERTAIN INFORMATION THAT SHOULD BE CONSIDERED IN CONNECTION WITH
THE EXCHANGE OFFER AND AN INVESTMENT IN THE NEW NOTES.


                                 --------------


          THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
          SECURITIES AND EXCHANGE COMMISSION OR BY ANY STATE SECURITIES
          COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR
           ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR
             ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE
                         CONTRARY IS A CRIMINAL OFFENSE.


                                 --------------


                 THE DATE OF THIS PROSPECTUS IS _________, 1996

                            (Continued on next page)

<PAGE>
(Cover page continued)

         GST USA, Inc., a Delaware  corporation ("GST USA"), hereby offers, upon
the terms and subject to the  conditions  set forth in this  Prospectus  and the
accompanying  Letter of Transmittal (the "Exchange  Offer"),  to exchange $1,000
principal  amount at maturity of its 13 7/8% Senior Discount  Exchange Notes Due
2005 (the "New  Notes")  for each  $1,000  principal  amount at  maturity of its
outstanding 13 7/8% Senior Discount Notes Due 2005 (the "Old Notes").  The offer
and sale of the New Notes have been registered under the Securities Act of 1933,
as amended (the "Securities  Act"),  pursuant to the Registration  Statement (as
defined  herein) of which this  Prospectus  constitutes  a part. As of March 31,
1996,  $166,327,787  aggregate  Accreted Value of the Old Notes was outstanding.
See "Description of the New Notes -- Certain  Definitions" for the definition of
Accreted  Value.  The Exchange  Offer is being made pursuant to the terms of the
registration  rights  agreement  (the  "Registration  Rights  Agreement")  dated
December 19, 1995 by and among GST USA, GST  Telecommunications,  Inc.  ("GST"),
the Specified  Subsidiaries named therein and Morgan Stanley & Co.  Incorporated
("MS&Co."),  as Placement Agent pursuant to the terms of the Placement Agreement
dated December 14, 1995,  among GST, GST USA, the Specified  Subsidiaries  named
therein and MS&Co. The New Notes and the Old Notes are collectively  referred to
herein as the "Notes." As used herein,  the term "Holder"  means a holder of the
Notes.

         The Notes are fully and  unconditionally  guaranteed by GST (the "Notes
Guarantee"). The Notes and the Notes Guarantee are senior, unsecured obligations
of GST USA and GST,  respectively,  rank pari passu in right of payment with all
unsubordinated,  unsecured obligations of GST USA and GST, respectively, and are
senior in right of payment to all subordinated  indebtedness of GST USA and GST,
respectively.  At  February  15,  1996,  GST  USA  and  GST  had no  outstanding
borrowings other than the Notes. GST USA and GST are each holding companies. The
Notes  and  the  Notes  Guarantee  will  be  effectively   subordinated  to  all
liabilities of GST USA's  subsidiaries,  including trade payables.  At March 31,
1996,  GST USA's  subsidiaries  had  approximately  $31.7 million of liabilities
(excluding intercompany payables),  including $19.9 million of indebtedness, all
of which was secured.

         GST USA will accept for exchange any and all Old Notes that are validly
tendered and not withdrawn on or prior to 5:00 p.m.,  New York City time, on the
date the Exchange Offer expires,  which will be __________ __, 1996 [20 BUSINESS
DAYS AFTER  COMMENCEMENT  OF THE EXCHANGE  OFFER],  unless the Exchange Offer is
extended (the "Expiration  Date").  Tenders of Old Notes may be withdrawn at any
time  prior to 5:00  p.m.,  New York City  time,  on the  Expiration  Date.  The
Exchange Offer is not conditioned upon any minimum  principal amount at maturity
of Old Notes being tendered for exchange. However, the Exchange Offer is subject
to  certain  conditions,  which may be  waived by GST USA,  and to the terms and
provisions of the Registration Rights Agreement.  Old Notes may be tendered only
in denominations  of $1,000 principal amount at maturity and integral  multiples
thereof.  GST USA has agreed to pay the expenses of the Exchange Offer. See "The
Exchange Offer."

         Any waiver,  extension or  termination  of the  Exchange  Offer will be
publicly  announced  by GST USA through a release to the Dow Jones News  Service
and as otherwise required by applicable law or regulations.

         The New Notes will be  obligations  of GST USA entitled to the benefits
of the  Indenture (as defined  herein).  The form and terms of the New Notes are
identical  in all  material  respects  to the form and  terms of the Old  Notes,
except that the offer and sale of the New Notes have been  registered  under the
Securities  Act. Any Old Notes not  tendered and accepted in the Exchange  Offer
will remain  outstanding  and will be entitled to all the rights and preferences
and will be subject to the limitations  applicable  thereto under the Indenture.
Following  consummation  of the  Exchange  Offer,  the Holders of Old Notes will
continue to be subject to the existing  restrictions  upon transfer  thereof and
GST USA will have no further  obligation  to such  Holders  to  provide  for the
registration  under  the  Securities  Act of the offer and sale of the Old Notes
held by them.  Following the completion of the Exchange Offer, none of the Notes
will be entitled to the contingent  increase in interest rate provided  pursuant
to the Registration Rights Agreement. See "The Exchange Offer."

         The Notes will mature on  December  15,  2005.  The New Notes are being
sold at a substantial discount from their principal amount and there will not be
any accrual of interest thereon prior to December 15, 2000. Each

<PAGE>

Note will have a  principal  amount at  maturity  of $1,000 and had an  Accreted
Value of $523.66 at  February  15,  1996.  Interest on the Notes will be paid in
cash at a rate of 13 7/8% per annum on each June 15 and December 15,  commencing
June 15, 2001.

         The Notes will be  redeemable  in whole or in part,  at any time, on or
after December 15, 2000, at the redemption prices set forth herein, plus accrued
and unpaid interest, if any, to the date of redemption.

         Based on no-action  letters  issued by the staff of the  Securities and
Exchange  Commission (the "Commission") to third parties,  GST USA believes that
New Notes issued  pursuant to this Exchange  Offer in exchange for Old Notes may
be offered for resale,  resold and  otherwise  transferred  by a Holder  thereof
other than (i) a  broker-dealer  who purchased  such Old Notes directly from GST
USA to resell pursuant to Rule 144A or any other  available  exemption under the
Securities  Act or (ii) a person that is an  "affiliate"  (within the meaning of
Rule 405 of the Securities Act) of GST USA or GST,  without  compliance with the
registration and prospectus  delivery provisions of the Securities Act, provided
that the  Holder  is  acquiring  the New  Notes in the  ordinary  course  of its
business and is not participating,  and has no arrangement or understanding with
any person to participate,  in the distribution of the New Notes. Holders of Old
Notes who tender in the Exchange  Offer with the intention to  participate  in a
distribution of the New Notes may not rely upon the position of the staff of the
Commission  enunciated in the  above-referenced  no-action letters,  and, in the
absence of an  exemption,  must  comply  with the  registration  and  prospectus
delivery  requirements  of the  Securities  Act in  connection  with a secondary
resale transaction.  Holders of Old Notes wishing to participate in the Exchange
Offer  must  represent  to GST  USA in  the  Letter  of  Transmittal  that  such
conditions have been met.

         Each  broker-dealer  (other than an "affiliate" of GST USA or GST) that
receives  New Notes for its own  account  pursuant  to the  Exchange  Offer must
acknowledge  that it will deliver a prospectus in connection  with any resale of
such New Notes. The Letter of Transmittal states that by so acknowledging and by
delivering a prospectus,  a broker-dealer will not be deemed to admit that it is
an "underwriter"  within the meaning of the Securities Act. This Prospectus,  as
it may be  amended  or  supplemented  from  time  to  time,  may  be  used  by a
broker-dealer  in connection  with resales of New Notes received in exchange for
Old Notes where such Old Notes were acquired by such  broker-dealer  as a result
of  market-making  activities  or other trading  activities.  GST USA has agreed
that, for a period of 180 days after the  consummation of the Exchange Offer, it
will make this Prospectus  available to any  broker-dealer for use in connection
with any such resale.  See "Plan of  Distribution."  Any broker-dealer who is an
affiliate of GST USA may not rely on such no-action letters and must comply with
the registration and prospectus  delivery  requirements of the Securities Act in
connection with a secondary resale transaction.

         The New Notes  constitute a new issue of securities with no established
trading market.  GST USA does not intend to list the New Notes on any securities
exchange or to seek  approval  for  quotation  through any  automated  quotation
system.  GST USA has been advised by MS&Co.  that,  following  completion of the
Exchange Offer, it currently intends to make a market in the New Notes; however,
MS&Co. is not obligated to do so and any  market-making  activities with respect
to the New Notes may be discontinued at any time. MS&Co. may act as principal or
agent in such  transactions.  There can be no assurance  that an active  trading
market for the New Notes will develop. To the extent that Old Notes are tendered
and accepted in the Exchange  Offer, a Holder's  ability to sell  untendered Old
Notes could be adversely  affected.  It is not expected  that an active  trading
market for the Old Notes will develop while they are subject to  restrictions on
transfer.

         This Prospectus, together with the Letter of Transmittal, is being sent
to all registered Holders of Old Notes as of _____________ __, 1996.

         Neither GST USA nor GST will  receive any proceeds  from this  Exchange
Offer. No  dealer-manager  is being used in connection with this Exchange Offer.
See "Use of Proceeds" and "Plan of Distribution."

<PAGE>

         No person has been  authorized to give any  information  or to make any
representations in connection with the Exchange Offer other than those contained
in this  Prospectus  and the Letter of Transmittal  and, if given or made,  such
information or representation  must not be relied upon as having been authorized
by GST USA, GST or the Exchange Agent (as defined herein).  This Prospectus does
not  constitute  an offer to sell or a  solicitation  of an offer to buy the New
Notes in any  jurisdiction  to any  person to whom it is  unlawful  to make such
offer or  solicitation  in such  jurisdiction.  The delivery of this  Prospectus
shall not, under any circumstances,  create any implication that the information
herein is correct at any time subsequent to its date.

                           ---------------------------

                                TABLE OF CONTENTS

                                                                       Page

AVAILABLE INFORMATION....................................................2
INCORPORATION OF CERTAIN DOCUMENTS
    BY REFERENCE.........................................................3
PROSPECTUS SUMMARY.......................................................4
RISK FACTORS............................................................13
THE EXCHANGE OFFER......................................................23
USE OF PROCEEDS.........................................................29
MATERIAL CHANGES........................................................29
DEFICIENCY IN EARNINGS TO COVER
    FIXED CHARGES.......................................................30
DESCRIPTION OF THE NEW NOTES............................................31
CERTAIN UNITED STATES FEDERAL
    INCOME TAX CONSIDERATIONS...........................................56
PLAN OF DISTRIBUTION....................................................60
LEGAL MATTERS...........................................................61
EXPERTS.................................................................61
INDEX TO FINANCIAL STATEMENTS..........................................F-1

                           ---------------------------

                              AVAILABLE INFORMATION

         GST USA and GST have filed with the Commission a Registration Statement
on Form F-2 under the  Securities  Act with respect to the New Notes  offered in
the Exchange Offer. For the purposes hereof, the term  "Registration  Statement"
means the original Registration Statement and any and all amendments thereto. In
accordance  with the rules and  regulations of the  Commission,  this Prospectus
does not contain all of the information set forth in the Registration  Statement
and the schedules and exhibits  thereto.  Each statement made in this Prospectus
concerning  a  document  filed as an exhibit to the  Registration  Statement  is
qualified in its entirety by reference to such exhibit for a complete  statement
of its provisions.  For further  information  pertaining to GST USA, GST and the
New Notes offered in the Exchange Offer,  reference is made to such Registration
Statement,  including  the  exhibits  and  schedules  thereto and the  financial
statements,  notes  and  schedules  filed as a part  thereof.  The  Registration
Statement  (and the exhibits and schedules  thereto) may be inspected and copied
at the public reference facilities maintained by the Commission at its principal
office at Judiciary Plaza, 450 Fifth Street, N.W., Room 1024,  Washington,  D.C.
20549,  or at its  regional  offices at 500 West  Madison  Street,  Suite  1400,
Chicago,  Illinois 60661 and at Seven World Trade Center,  Suite 1300, New York,
New York 10048.  Any interested party may obtain copies of all or any portion of
the Registration Statement and the exhibits thereto at prescribed rates from the
Public Reference  Section of the Commission at its principal office at Judiciary
Plaza, 450 Fifth Street, Room 1024, Washington, D.C. 20549.

         GST is  subject to the  informational  requirements  of the  Securities
Exchange  Act of 1934,  as  amended  (the  "Exchange  Act"),  and in  accordance
therewith files reports and other information with the Commission.  Such reports
and other  information  can be  inspected  and  copied at the  public  reference
facilities  maintained by the Commission at Judiciary  Plaza,  450 Fifth Street,
N.W.,  Washington,  D.C. 20549;  500 West Madison Street,  Suite 1400,  Chicago,
Illinois  60661;  and Seven World Trade Center,  Suite 1300,  New York, New York
10048. Copies

                                       -2-

<PAGE>
of such  material  can be  obtained  from the  Public  Reference  Section of the
Commission at Judiciary Plaza, 450 Fifth Street, N.W.,  Washington,  D.C. 20549,
at  prescribed  rates.  GST's  Common  Shares are listed on the  American  Stock
Exchange,  Inc. (the "AMEX") and such reports and other  information may also be
inspected  at the  offices of the AMEX,  86 Trinity  Place,  New York,  New York
10006.

         The Indenture  requires GST and, in certain  circumstances,  GST USA to
file with the  Commission  the annual,  quarterly and other reports  required by
Sections 13(a), 13(c) and 15(d) of the Exchange Act,  regardless of whether such
Sections are  applicable  to GST USA or GST. GST or GST USA, as the case may be,
will  supply  without  cost to each  Holder of Notes,  and file with the trustee
under the Indenture,  within fifteen days after GST is required to file the same
with the  Commission,  copies of the  audited  financial  statements,  quarterly
reports and other  reports  which GST USA and GST are  required to file with the
Commission  pursuant to Sections  13(a),  13(c) and 15(d) of the  Exchange  Act;
provided,  however,  that in the  event GST is no longer  the  guarantor  on the
Notes,  GST shall no longer be required to file such reports and GST USA will be
required to file such reports,  in each case as of the date and time that GST is
no longer the guarantor on the Notes.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

   
         GST's Annual Report on Form 20-F, as amended, for the fiscal year ended
September  30, 1995 (the "Form 20-F") and Report of Foreign  Issuer on Form 6-K,
as  amended,  for the  quarter  ended  December  31,  1995 (the "Form  6-K") are
incorporated  by reference in this  Prospectus  and shall be deemed to be a part
hereof.
    

         GST hereby  undertakes to provide without charge to each person to whom
a copy of this Prospectus has been delivered,  on the written or oral request of
any such person,  a copy of any or all of the documents  referred to above which
have been or may be  incorporated  in this  Prospectus by reference,  other than
exhibits to such documents.  Written requests for such copies should be directed
to GST  Telecommunications,  Inc. at 1030-999 West Hastings  Street,  Vancouver,
British Columbia, Canada V6C 2W2, Attention: Robert M. Blankstein. Oral requests
should be directed to such individual (telephone number (604) 688-0553).

                               ------------------

         No dealer,  salesman or other  person has been  authorized  to give any
information or to make any  representations  other than those  contained in this
Prospectus in connection with the offer made hereby, and, if given or made, such
information or representations must not be relied upon as having been authorized
by GST USA or GST. This  Prospectus  does not  constitute an offer to sell, or a
solicitation of an offer to buy, the securities  offered hereby to any person in
any state or other jurisdiction in which such offer or solicitation is unlawful.
The  delivery  of this  Prospectus  at any time does not imply that  information
contained herein is correct as of any time subsequent to its date.

                                       -3-

<PAGE>

                               PROSPECTUS SUMMARY

         The  following  prospectus  summary is qualified in its entirety by the
more detailed information and consolidated  financial statements,  including the
notes thereto,  appearing  elsewhere in this Prospectus and in the Form 20-F and
the Form 6-K. Unless the context otherwise  requires,  in this Prospectus and in
the reports and financial  statements  incorporated  herein,  the term "Company"
means the combined business  operations of GST and its  subsidiaries,  including
GST USA;  the terms  "fiscal"  and "fiscal  year" refer to GST's  fiscal  years,
including the year ended  September 30, 1995, 13 months ended September 30, 1994
and the year ended August 31, 1993; and all dollar amounts are in U.S.  dollars.
Industry   figures  were  obtained   from  reports   published  by  the  Federal
Communications Commission (the "FCC"), the U.S. Department of Commerce and other
industry sources,  which the Company has not independently  verified.  Investors
should  carefully  consider the  information  set forth under the caption  "Risk
Factors,"  including the risks relating to historical and anticipated  operating
losses and negative EBITDA.

                                   THE COMPANY

         The  Company  provides a broad  range of  competitive  access and other
telecommunications products and services, primarily to customers located in Tier
II and Tier III  cities  (populations  between  250,000  and  2,000,000)  in the
western  continental  United States and Hawaii. As a competitive access provider
("CAP"),  the Company  operates fully digital  telecommunications  networks that
provide an  alternative to the local exchange  telephone  company  ("LEC") for a
number of products and services. The Company recently began commercial operation
of five fiber optic competitive access networks, holds a 50% interest in another
and  operates a digital  microwave  competitive  access  network in Hawaii.  The
Company is constructing an additional  fiber optic  competitive  access network,
which is expected  to commence  commercial  operation  in the second  quarter of
1996. The Company deems a network to be commercially  operational when the fiber
optic  cables and  related  electronics  permit the  Company to provide  special
access and private  line  services.  The  addition of a switch to a network will
enhance  the  services  such  network  can  provide;  however,  a switch  is not
necessary for the operation of a network.  As a complement to its networks,  the
Company recently  acquired an international  and domestic long distance carrier.
In addition, the Company manufactures telecommunications switching equipment and
provides  network  management  and  billing  systems  through  its  wholly-owned
subsidiary, National Applied Computer Technologies, Inc. ("NACT").

         As regulatory and competitive conditions permit, the Company intends to
offer integrated local and long distance services through the deployment of high
capacity, digital switches in cities in which the Company operates a competitive
access  network,  as well as  cities  in which  the  Company  will rely upon the
facilities of the LEC. This would expand the  Company's  addressable  market and
enhance  the  operating   leverage  of  its  networks,   thereby  improving  its
opportunity to participate,  on a regional basis, in both the local exchange and
long distance  markets in the United States.  The ability to provide  interstate
switched access and other enhanced  services would enable the Company to offer a
more comprehensive solution to its customers' telecommunications needs.

         In October 1994, the Company and Tomen America, Inc. ("Tomen America"),
a subsidiary of Tomen Corporation  ("Tomen"),  an international  general trading
company,  entered  into  agreements  (the  "Tomen  Facility")  under which Tomen
America  agreed to make  available up to a total of $100.0  million of financing
for competitive access network construction and development to be allocated on a
project by project  basis.  Tomen America has a right of first refusal up to the
limit of such facility to evaluate and, in its discretion,  finance each network
project.  Under the terms of the Tomen  Facility,  Tomen  America and Tomen have
purchased Common Shares and warrants to purchase Common Shares and another Tomen
Subsidiary  has purchased 10% of the equity in two of the Company's  competitive
access networks. In addition, Tomen America's designee has been elected to GST's
Board of Directors.


                                       -4-

<PAGE>
TELECOMMUNICATIONS SERVICES

         The locations and dates of commencement of commercial operation of the
Company's networks are as follows:
<TABLE>
<CAPTION>
                Network                               Service Area                    Date Commercially Operational
- ------------------------------------     ------------------------------------     ------------------------------------
<S>                                      <C>                                      <C> 
San Bernardino, California               San Bernardino, Riverside, Rialto        April 1995
                                         and Bloomington

Hawaii                                   Oahu, Maui, Molokai and Hawaii           September 1988

Ontario, California                      Ontario, City of Industry and            August 1995
                                         Monterey Park

Tucson, Arizona                          Tucson metropolitan area                 September 1995

Fresno, California                       Fresno                                   January 1996

Albuquerque, New Mexico                  Albuquerque metropolitan area            January 1996

Phoenix, Arizona*                        Phoenix metropolitan area                February 1994
</TABLE>

- --------------------

* The Company has a 50% interest in this network.

The  Company  is also  constructing  a  competitive  access  network  in  Contra
Costa/Alameda  Counties,  California,  which is expected to commence  commercial
operation during the second quarter of 1996.

         The  Company  acquired  its  Hawaiian  microwave  network in 1994,  has
recently  begun to upgrade  and expand it and,  where  appropriate,  will deploy
fiber optic cable.  The Company is  currently  one of two  authorized  statewide
private line competitors to GTE Hawaiian  Telephone  Company  Incorporated,  the
dominant service provider in the Hawaiian Islands.

         Effective   May   1,   1995,   the   Company   acquired   International
Telemanagement  Group, Inc. ("ITG"), an international and domestic long distance
carrier  which,  together with the Company's  wholly-owned  subsidiary,  Wasatch
International  Network Services,  Inc.  ("WINS"),  offers enhanced long distance
services,  such as toll-free "800," private line,  calling card, prepaid calling
card and  international  call  back  services  to  end-users,  agents  and other
carriers.  The  acquisition  of ITG enables the Company to more fully  integrate
long distance and other related services into the package of  telecommunications
services it offers to its network customers.

TELECOMMUNICATIONS SERVICES STRATEGY

         The Company's goal is to become a leading  provider of a broad range of
integrated local and long distance  telecommunications  products and services in
its targeted markets.  In furtherance of this goal, the Company's strategy is to
develop  and  expand  its  networks  and  customer  base,  broaden  the range of
telecommunications  services  and  products  it  offers  and  capitalize  on its
advantageous  position in California and Hawaii.  The Company ultimately intends
to assemble an  integrated,  regional  network  through a  combination  of owned
facilities,  joint  ventures  with other CAPs and fiber optic lines  leased from
long distance  providers,  cable  companies and  utilities.  Key elements of the
Company's strategy are as follows:

         COMPETITIVE  ACCESS NETWORKS.  The Company seeks to selectively  expand
its  competitive   access  business  by  implementing  the  following   business
strategies:

                                       -5-

<PAGE>
         FOCUS ON END-USERS.  The Company  focuses on business,  government  and
academic end-users that have significant  telecommunications  requirements.  The
Company  intends to  increase  its  customers'  reliance  on and  loyalty to the
Company and,  over time,  secure a growing  portion of their  telecommunications
business through the provision of additional integrated services.  This strategy
is also designed to build a broad base of recurring  revenues,  thereby avoiding
dependency on a large customer in a market. However, revenues from long distance
carriers  and  resellers  will  continue  to be an  important  component  of the
Company's  access  services  revenues,  particularly  in  the  early  stages  of
commercial operation.

         EARLY TO MARKET ADVANTAGE. The Company strives to be the first CAP in a
geographic area to actively market and provide competitive access services, and,
ideally,  the first CAP to obtain necessary permits,  rights-of-way and licenses
and to construct and operate a network. The Company believes that the first such
CAP has a significant competitive advantage in securing customers that desire an
alternative to the incumbent  LECs and that later  entrants may have  difficulty
obtaining rights-of-way, permits and licenses necessary to construct and operate
a network  in a timely and cost  effective  manner.  However,  the  Company  has
entered and may in the future enter  certain  markets as the second or third CAP
in special circumstances,  such as an agreement with a long distance carrier for
a guaranteed volume of  telecommunications  traffic or a strategic alliance with
electric or natural gas utilities.

         EMPHASIS ON TIER II AND TIER III  MARKETS.  The Company  believes  that
emphasizing  the  development  of networks in Tier II and Tier III markets  will
reduce the likelihood of  competition  from other CAPs,  particularly  the large
CAPs that have principally  developed networks in the major metropolitan  areas.
The Company  believes that certain of these smaller  markets offer an attractive
combination  of lower  construction  and  operating  costs and  significant  and
concentrated telecommunications traffic.

         REGIONAL FOCUS. The Company is focusing on the western United States in
order  to  take  advantage  of  a  favorable  regulatory   environment  and  the
substantial  telecommunications  traffic  patterns  that exist among the western
United  States,  the  Pacific  Rim,  Mexico  and  western  Canada.  Further,  by
concentrating on one region, the Company believes it will be able to efficiently
develop,  operate and control its  networks.  In  California,  for example,  the
Company holds a statewide  license to provide  services and has a statewide pole
attachment  agreement,  which enables the Company to develop additional networks
and to expand its existing networks without the delays typically  experienced in
obtaining individual licenses and rights-of-way.

         DEPLOYMENT OF SWITCHED AND ENHANCED  SERVICES.  The Company  intends to
deploy  switches for interstate  switched  access and, as regulatory  conditions
permit,  intrastate switched access, enhanced services and full local dial tone.
The Company  believes that  switched  services will  complement  long  distance,
special  access and other  services  as part of its  strategy  to provide  total
telecommunications  solutions to its customers.  Initially, the Company plans to
install switching equipment in its operational  networks and in markets where it
is actively  constructing  networks.  The Company may also  install  switches in
cities where the Company  expects to construct a competitive  access network and
in certain  other  cities  where the  Company  will rely on LEC  facilities  for
transmission. The Company will seek regulatory approval for the provision of the
full array of local services in those  jurisdictions in which it will deploy its
switches.

         The  Company  intends  to  deploy  frame  relay  and ATM  (Asynchronous
Transfer  Mode)  switches and to provide data services to its customers  through
its  competitive  access  networks  and through the  facilities  of LECs.  These
services will include frame relay,  private data line,  LAN (Local Area Network)
based and Internet access services and may include additional enhanced services.

         The Company is exploring opportunities to expand its telecommunications
services  business by internal  development and through  acquisitions  and joint
ventures.


                                       -6-

<PAGE>
MANUFACTURING OPERATIONS

         The Company  manufactures,  markets,  installs  and  supports  advanced
telecommunications  switching  equipment  and provides  network  management  and
billing systems for specialty telecommunications network operators. The customer
base for these  products and  services  includes  small local and long  distance
carriers,  prepaid  calling  card  network  operators,  international  call back
providers, hotel complexes, correctional facilities, pay telephone operators and
other  customers  that  require an  integrated  switching  platform  and network
management  and  billing  system.  The  Company's  systems  consist  of both the
hardware and the software  necessary to (i) provide enhanced  network  services,
(ii)  automatically  route  traffic  through  various  local  and long  distance
carriers and (iii) bill the services to the customer.  The Company has developed
and  integrated  into  its  products  extensive  fraud  prevention  and  traffic
engineering  technologies.  Revenues and earnings have grown significantly since
the Company acquired NACT in late 1993.

         For a more complete description of the business of the Company, see the
Form 20-F.

RECENT DEVELOPMENTS

         In December  1995, GST sold  $20,000,187 13 7/8% of Convertible  Senior
Subordinated  Discount Notes due 2005 (the  "Convertible  Notes") pursuant to an
indenture  and  GST  USA  sold  $160,001,496  of the Old  Notes  pursuant  to an
indenture (the  "Indenture") in a private  placement (the "December  Offering").
See  "Description  of the  New  Notes."  Of the  net  proceeds  of the  December
Offering, $2.0 million was applied to the repayment of short-term  indebtedness,
and the  balance  will be  used  for  capital  expenditures  and to fund  future
operating deficits and for working capital purposes.

         In March 1996, the Company, through its subsidiary, GST Internet, Inc.,
a Delaware corporation ("GST Internet"),  entered the Internet services business
with GST Internet's purchase of the assets of Reservations, Inc. d/b/a Hawaii On
Line, a Hawaii  corporation  ("Hawaii On Line").  Hawaii On Line, at the time of
its purchase, was the largest Internet service provider in Hawaii with more than
6,000 customers and also operated a World Wide Web site design business.

         The  Company's  principal  executive  offices  are located at 4317 N.E.
Thurston  Way,  Vancouver,  Washington  98662  and its  phone  number  is  (360)
254-4700.


                                       -7-

<PAGE>

                   SUMMARY OF THE TERMS OF THE EXCHANGE OFFER

The Exchange Offer.......     Pursuant to the Exchange Offer,  New Notes will be
                              issued  in  exchange  for  outstanding  Old  Notes
                              validly  tendered and not withdrawn.  The Accreted
                              Value  of the New  Notes  will be equal to that of
                              the Old Notes and will be issued in  denominations
                              of $1,000 in principal  amount at maturity and any
                              integral multiple of $1,000 in excess thereof. GST
                              USA will issue New Notes to  tendering  Holders of
                              Old Notes as  promptly  as  practicable  after the
                              Expiration Date.

Resale...................     Based  on an  interpretation  by the  staff of the
                              Commission  set forth in no-action  letters issued
                              to third  parties,  GST USA believes  that the New
                              Notes  issued  pursuant to the  Exchange  Offer in
                              exchange  for Old Notes may be offered for resale,
                              resold  and  otherwise  transferred  by any Holder
                              thereof (other than  broker-dealers,  as set forth
                              below,  and any such Holder that is an "affiliate"
                              (within   the   meaning  of  Rule  405  under  the
                              Securities   Act)  of  GST  USA  or  GST)  without
                              compliance  with the  registration  and prospectus
                              delivery   provisions  of  the   Securities   Act,
                              provided  that such New Notes are  acquired in the
                              ordinary course of such Holder's business and that
                              such Holder has no  arrangement  or  understanding
                              with any person to participate in the distribution
                              of such New Notes. Each broker-dealer  (other than
                              an affiliate of GST USA or GST) that  receives New
                              Notes  for its own  account  in  exchange  for Old
                              Notes   that   were   acquired   as  a  result  of
                              market-making   or  other  trading  activity  must
                              acknowledge  that it will deliver a prospectus  in
                              connection with any resale of such New Notes.  The
                              Letter   of   Transmittal   states   that   by  so
                              acknowledging  and  delivering a prospectus,  such
                              broker-dealer  will not be deemed to admit that it
                              is an  "underwriter"  within  the  meaning  of the
                              Securities  Act.  This  Prospectus,  as it  may be
                              amended or supplemented  from time to time, may be
                              used by such  broker-  dealer in  connection  with
                              resales of New Notes  received in exchange for Old
                              Notes  where such New Notes were  acquired by such
                              broker-dealer   as  a  result   of   market-making
                              activities  or other trading  activities.  GST USA
                              has  agreed  that,  for a period of 180 days after
                              the Expiration  Date, it will make this Prospectus
                              available  to any  such  broker-dealer  for use in
                              connection  with any  such  resale.  See  "Plan of
                              Distribution."  Any  Holder  who  tenders  in  the
                              Exchange Offer with the intention to  participate,
                              or  for  the  purpose  of   participating,   in  a
                              distribution  of  the  New  Notes  or  who  is  an
                              affiliate  of GST USA or GST  may not  rely on the
                              position of the staff of the Commission enunciated
                              in EXXON CAPITAL HOLDINGS  CORPORATION  (available
                              May 13, 1988) or similar no-action letters and, in
                              the absence of an exemption therefrom, must comply
                              with  the  registration  and  prospectus  delivery
                              requirements  of the  Securities Act in connection
                              with a secondary  resale  transaction.  Failure to
                              comply with such requirements in such instance may
                              result in such Holder incurring  liabilities under
                              the  Securities  Act for which  the  Holder is not
                              indemnified by GST USA or GST.

                                                        -8-
<PAGE>
                              The Exchange  Offer is not being made to, nor will
                              GST USA  accept  surrenders  for  exchanges  from,
                              Holders of Old Notes in any  jurisdiction in which
                              this  Exchange  Offer  or the  acceptance  thereof
                              would not be in compliance  with the securities or
                              blue sky laws of such jurisdiction.

Expiration Date..........     5:00 p.m., New York City time, on _______ __, 1996
                              [20  BUSINESS  DAYS  AFTER   COMMENCEMENT  OF  THE
                              EXCHANGE  OFFER],  unless  the  Exchange  Offer is
                              extended, in which case the term "Expiration Date"
                              means  the  latest  date  and  time to  which  the
                              Exchange  Offer is  extended.  Any  extension,  if
                              made, will be publicly announced through a release
                              to the Dow Jones  News  Service  and as  otherwise
                              required by applicable law or regulations.

Conditions to the
  Exchange Offer.........     The   Exchange   Offer  is   subject   to  certain
                              conditions,  which may be  waived by GST USA.  See
                              "The   Exchange  --  Conditions  to  the  Exchange
                              Offer." The Exchange Offer is not conditioned upon
                              any  minimum  principal  amount at maturity of Old
                              Notes being tendered.

Procedures for Tendering
  Old Notes................   Each  Holder of Old Notes  wishing  to accept  the
                              Exchange  Offer must  complete,  sign and date the
                              Letter of Transmittal,  or a facsimile thereof, in
                              accordance with the instructions  contained herein
                              and  therein,  and mail or  otherwise  deliver the
                              Letter of  Transmittal,  or a  facsimile  thereof,
                              together  with the Old Notes to be  exchanged  and
                              any other required  documentation to United States
                              Trust Company of New York, as Exchange  Agent,  at
                              the  address  set forth  herein  and  therein.  By
                              executing  a Letter of  Transmittal,  each  Holder
                              will  represent  to GST USA and  GST  that,  among
                              other things,  the New Notes acquired  pursuant to
                              the  Exchange  Offer  are  being  obtained  in the
                              ordinary   course  of   business   of  the  person
                              receiving  such  New  Notes,  whether  or not such
                              person is the Holder,  that neither the Holder nor
                              any  such  other  person  has any  arrangement  or
                              understanding  with any person to  participate  in
                              the  distribution  of  such  New  Notes  and  that
                              neither the Holder nor any such other person is an
                              "affiliate,"  as  defined  in Rule 405  under  the
                              Securities Act, of GST USA or GST.

Special Procedures for
  Beneficial Owners......     Any   beneficial   owner   whose   Old  Notes  are
                              registered  in  the  name  of  a  broker,  dealer,
                              commercial  bank,  trust  company or other nominee
                              and who  wishes to tender  in the  Exchange  Offer
                              should contact such registered Holder promptly and
                              instruct such registered  Holder to tender on such
                              beneficial  owner's  behalf.  If  such  beneficial
                              owner  wishes to tender  on his own  behalf,  such
                              beneficial  owner must,  prior to  completing  and
                              executing the Letter of Transmittal and delivering
                              his   Old   Notes,    either   make    appropriate
                              arrangements  to  register  ownership  of the  Old
                              Notes in such  owner's  name or obtain a  properly
                              completed bond power from the  registered  Holder.
                              The transfer of registered

                                       -9-

<PAGE>
                              ownership may take  considerable  time and may not
                              be able to be  completed  prior to the  Expiration
                              Date.

Guaranteed Delivery
  Procedures...............   Holders  of Old Notes who wish to tender  such Old
                              Notes and  whose  Old  Notes  are not  immediately
                              available  or who cannot  deliver  their Old Notes
                              and a properly  completed Letter of Transmittal or
                              any  other  documents  required  by the  Letter of
                              Transmittal  to the  Exchange  Agent  prior to the
                              Expiration   Date  may  tender   their  Old  Notes
                              according to the  guaranteed  delivery  procedures
                              set forth in "The Exchange Offer -- Procedures for
                              Tendering."

Acceptance of Old Notes
 and Delivery of New
 Notes...................     Subject to certain  conditions  (as described more
                              fully in "The Exchange  Offer -- Conditions to the
                              Exchange Offer"), GST USA will accept for exchange
                              any and all Old Notes that are  properly  tendered
                              in the Exchange Offer and not withdrawn,  prior to
                              5:00 p.m.,  New York City time, on the  Expiration
                              Date.  The  New  Notes  issued   pursuant  to  the
                              Exchange  Offer will be  delivered  as promptly as
                              practicable following the Expiration Date.

Withdrawal Rights........     Subject  to  the   conditions  set  forth  herein,
                              tenders of Old Notes may be  withdrawn at any time
                              prior to 5:00  p.m.,  New York City  time,  on the
                              Expiration   Date.  See  "The  Exchange  Offer  --
                              Withdrawal of Tenders."

Certain United States 
  Federal Income Tax
  Considerations.........     The exchange pursuant to the Exchange Offer should
                              not  constitute  a  taxable  exchange  for  United
                              States federal income tax purposes.  Each such New
                              Note should be treated as having  been  originally
                              issued at the time the Old Note exchanged therefor
                              was originally  issued. See "Certain United States
                              Federal Income Tax Considerations."

Exchange Agent...........     United  States  Trust  Company  of New  York,  the
                              Trustee  under  the   Indenture,   is  serving  as
                              exchange   agent   (the   "Exchange   Agent")   in
                              connection   with   the   Exchange   Offer.    For
                              information  with respect to the  Exchange  Offer,
                              the  telephone  number for the  Exchange  Agent is
                              (800)  548-6565 and the  facsimile  number for the
                              Exchange Agent is (212) 420-6152.


SEE "THE EXCHANGE OFFER" FOR MORE DETAILED  INFORMATION  CONCERNING THE TERMS OF
THE EXCHANGE OFFER.

                                      -10-
<PAGE>
                      SUMMARY DESCRIPTION OF THE NEW NOTES

         The Exchange Offer applies to $166,327,787  aggregate Accreted Value of
Old Notes.  The form and terms of the New Notes will be the same in all material
respects as the form and terms of the Old Notes,  except that the offer and sale
of the New Notes will be registered under the Securities Act and, therefore, the
New  Notes  will  not  bear  legends  restricting  the  transfer  thereof.  Upon
consummation  of the  Exchange  Offer,  none of the Notes  will be  entitled  to
registration rights under the Registration Rights Agreement.  The New Notes will
evidence the same debt as the Old Notes, will be entitled to the benefits of the
Indenture  and will be treated as a single class  thereunder  with any Old Notes
that remain outstanding. See "Description of the New Notes."

Issuer...................     GST USA, Inc.

Maturity Date............     December 15, 2005

Securities Offered.......     $166,327,787 aggregate  Accreted  Value of 13 7/8%
                              Senior Discount Exchange Notes Due 2005.

Yield and Interest.......     The Notes are being sold at a substantial discount
                              from their principal  amount and there will not be
                              any accrual of cash interest on the Notes prior to
                              December  15, 2000 or payment of cash  interest on
                              the Notes prior to June 15, 2001. For a discussion
                              of the United States  federal income tax treatment
                              of the  Notes  and  the  original  issue  discount
                              rules,  see "Certain  United States Federal Income
                              Tax  Considerations."  From and after December 15,
                              2000, the Notes will bear interest at a rate of 13
                              7/8% per  annum,  payable in cash on each June 15,
                              and December 15, commencing June 15, 2001.

Ranking..................     The Notes and the Notes  Guarantee will be senior,
                              unsecured   obligations   of  GST  USA  and   GST,
                              respectively,  will  rank  PARI  PASSU in right of
                              payment   with   all   unsubordinated,   unsecured
                              obligations of GST USA and GST, respectively,  and
                              will  be  senior  in  right  of   payment  to  all
                              subordinated  indebtedness  of GST  USA  and  GST,
                              respectively.  At February 15,  1996,  GST USA and
                              GST had no outstanding  borrowings  other than the
                              Notes. GST USA and GST are each holding companies.
                              The  Notes  and  the  Notes   Guarantee   will  be
                              effectively subordinated to all liabilities of GST
                              USA's subsidiaries,  including trade payables.  At
                              March  31,  1996,  GST  USA's   subsidiaries   had
                              approximately   $31.7   million   of   liabilities
                              (excluding intercompany payables), including $19.9
                              million of indebtedness, all of which was secured.
                              The Company expects to incur  substantial  amounts
                              of additional  indebtedness in the future, subject
                              to compliance  with the  limitations  contained in
                              the  Indenture.  See "Risk  Factors -- Significant
                              Capital    Requirements"   and   "--   Substantial
                              Indebtedness; Ability to Service Debt."

Notes Guarantee..........     The  Notes  will  be   guaranteed   on  a  senior,
                              unsecured basis by GST.

Optional Redemption......     On and after  December 15, 2000, the Notes will be
                              redeemable  at the option of GST USA,  in whole at
                              any  time or in part  from  time to  time,  at the
                              redemption  prices set forth herein,  plus accrued
                              and  unpaid  interest,  if  any,  to the  date  of
                              redemption.  See  "Description of the New Notes --
                              Optional Redemption."

Additional Amounts.......     Any  payments  in respect of the Notes made by GST
                              pursuant  to the  Notes  Guarantee  will  be  made
                              without  withholding  or  deduction  for  Canadian
                              taxes unless required by law or the interpretation
                              or administration  thereof, in which case GST will
                              pay such additional

                                      -11-

<PAGE>

                              amounts as may be necessary so that the net amount
                              received by the Holders after such  withholding or
                              deduction  will not be less than the  amount  that
                              would have been  received  in the  absence of such
                              withholding or deduction.  See "Description of the
                              New Notes -- Additional Amounts."

Redemption for Changes 
  in Canadian
  Withholding Taxes......     In  the  event  GST  becomes   obligated  to  make
                              payments pursuant to the Notes Guarantee and, as a
                              result  of  certain  changes  affecting   Canadian
                              withholding  taxes GST  becomes  obligated  to pay
                              additional   amounts   in   accordance   with  the
                              Indenture,  the  Notes  will be  redeemable,  as a
                              whole but not in part, at the option of GST at any
                              time at 100% of their  Accreted Value plus accrued
                              interest.  See  "Description  of the New  Notes --
                              Optional Redemption."


Change of Control........     Upon a Change of Control, GST USA will be required
                              to  make an  offer  to  purchase  the  Notes  at a
                              purchase  price  equal to 101% of  their  Accreted
                              Value  on  the  date  of  purchase   plus  accrued
                              interest,  if  any.  See  "Description  of the New
                              Notes  --  Repurchase  of Notes  upon a Change  of
                              Control."

Certain Covenants........     The Indenture  contains  certain  covenants which,
                              among other  things,  restrict  the ability of GST
                              and  its  Restricted   Subsidiaries   (as  defined
                              below),  including  GST USA, to: incur  additional
                              indebtedness;     create    liens;    engage    in
                              sale-leaseback transactions; pay dividends or make
                              distributions  in respect of their capital  stock;
                              make  investments or make certain other restricted
                              payments;  sell assets; create restrictions on the
                              ability of Restricted Subsidiaries to make certain
                              payments;   issue  or  sell  stock  of  Restricted
                              Subsidiaries;   enter   into   transactions   with
                              stockholders or affiliates; and consolidate, merge
                              or sell all or substantially  all of their assets.
                              However,  these  limitations  will be subject to a
                              number of important qualifications and exceptions.
                              See "Description of the New Notes -- Covenants."

Settlement at DTC........     Transfers  of Notes  between  participants  in The
                              Depository  Trust Company ("DTC") will be effected
                              in the ordinary way in  accordance  with DTC rules
                              and will be settled in next-day funds.


                                      -12-
<PAGE>
                                  RISK FACTORS
   
DEVELOPMENT AND EXPANSION RISK AND  POSSIBLE INABILITY TO MANAGE GROWTH
    

         The  Company  is in  the  early  stages  of  its  operations.  Its  San
Bernardino,  Ontario, Tucson, Albuquerque and Fresno networks have only recently
become commercially operational and the Company has not deployed any switches in
its competitive access networks.  The continued expansion and development of the
Company's  competitive access networks and the success of the Company's switched
and  enhanced  services  strategy  will  depend,  among other  things,  upon the
Company's ability to assess potential markets, design fiber backbone routes that
provide ready access to a substantial  customer base, secure  financing,  obtain
required  rights-of-way over privately- and publicly-owned land, building access
and governmental  permits,  implement expanded  interconnection  and collocation
with facilities  owned by LECs and achieve a sufficient  customer base, and upon
subsequent changes in state and federal  regulations.  There can be no assurance
that any  networks to be  developed  or further  developed  will be completed on
schedule,   at  a   commercially   reasonable   cost  or  within  the  Company's
specifications. In addition, the expansion of the Company's business may involve
acquisitions,  which, if made, could divert the resources and management time of
the Company and could require  integration with the Company's  existing networks
and services.  The Company's future  performance will depend,  in part, upon its
ability to manage its growth  effectively,  which will require it to continue to
implement and improve its  operating,  financial and  accounting  systems and to
expand,  train and manage its  employee  base.  These  factors and others  could
adversely  affect the expansion of the customer  base of the Company's  existing
networks,  as  well  as  commencement  of new  services  and  operations  of new
networks.  The Company's inability either to expand in accordance with its plans
or to manage its growth could have a material  adverse  effect on its  business,
growth, financial condition and results of operations.

HISTORICAL AND ANTICIPATED FUTURE OPERATING LOSSES AND NEGATIVE EBITDA

         The Company has  incurred  and expects to continue to incur  increasing
operating  losses and  negative  EBITDA while it expands its business and builds
its customer  base. The Company has incurred  significant  increases in expenses
associated with these  activities and there can be no assurance that an adequate
customer  base with  respect to any or all of its  services  will be achieved or
sustained. The Company does not expect to achieve a significant market share for
its competitive access and long distance services. The Company had a net loss of
approximately  $7.4 million and negative  EBITDA of $4.5 million for the quarter
ended  December  31,  1995.  The Company had a net loss of  approximately  $11.3
million and  negative  EBITDA of $8.8 million for the year ended  September  30,
1995 and a net loss of  approximately  $3.5 million and negative  EBITDA of $0.8
million for the 13 months ended  September  30, 1994.  There can be no assurance
that the Company  will  achieve or sustain  profitability  or generate  positive
EBITDA.

SIGNIFICANT CAPITAL REQUIREMENTS

         The Company believes that the net proceeds from the December  Offering,
together with  borrowings  expected to be approved  under the Tomen Facility and
vendor financing and capital lease  arrangements,  will provide sufficient funds
for the  Company to expand its  business  as planned  and to fund its  operating
expenses  for the next 18 to 24 months.  The  Company  thereafter  will  require
substantial capital from outside sources for the foreseeable future to fund cash
flow  deficits  from  operating  activities  and for the  expansion  of existing
networks,  the  development  of additional  networks  (which could occur through
acquisitions  and joint  ventures)  and the  purchase  of  switching  equipment.
Additional  sources of capital  may include  public and private  equity and debt
financings by the Company or its subsidiaries, sales of non-strategic assets and
other  financing  arrangements.  There  can  be  no  assurance  that  additional
borrowings  under the Tomen Facility will be approved,  or that vendor financing
or capital  lease  arrangements  will be  available  to the Company or that,  if
available,  such vendor financing or capital lease  arrangements can be obtained
on terms  acceptable  to the  Company.  Failure to obtain such  financing  would
result in the delay or abandonment  of some or all of the Company's  development
and expansion plans and expenditures

                                      -13-

<PAGE>
and would have a material adverse effect on the Company's business. Such failure
could also limit the  ability of the  Company  to make  principal  and  interest
payments on the Notes.

         The Company has no working capital or other credit facility under which
it may borrow for working capital and other general  corporate  purposes.  There
can be no assurance that such a facility will be available to the Company in the
future or that if such a facility were available,  that it would be available on
terms and conditions acceptable to the Company.

SUBSTANTIAL INDEBTEDNESS

         At March 31, 1996, the Company had outstanding on a consolidated  basis
approximately  $219.2 million of  indebtedness.  The accretion of original issue
discount on the Notes will cause an increase in  indebtedness  of $164.9 million
by  December  15,  2000.  The  Indenture  limits,  but  does not  prohibit,  the
incurrence of additional  indebtedness by the Company.  The Company  anticipates
that it will  incur  substantial  additional  indebtedness  in the  future.  The
Company  has  submitted  proposals  for  approximately  $65.3  million  of  debt
financing under the Tomen Facility for network projects,  of which proposals for
$27.0  million of financing  have been  approved,  and is currently  negotiating
vendor financing  arrangements.  Under the terms of the Tomen Facility, up to an
additional  $16.2  million  of  indebtedness  could  be  incurred  to  fund  the
development and construction of additional networks, including Fresno and Contra
Costa/Alameda  Counties,  if and to the extent that proposals for the funding of
such  networks are  approved by Tomen  America.  There can be no assurance  that
Tomen America will provide funding for the remaining  submitted  projects or any
additional  projects,  in which case the Company  will be required to seek other
sources  of equity or debt  financing.  The  Company's  total  indebtedness  was
increased  by $180.0  million  as a result of the  December  Offering  and total
interest expense was increased concomitantly.

         The  level  of  the  Company's   indebtedness   could  have   important
consequences  to its future  prospects,  including the  following:  (i) the debt
service requirements of any additional indebtedness could make it more difficult
for GST USA to make  payments  on the Notes;  (ii) the ability of the Company to
obtain  any  necessary  financing  in the future for  working  capital,  capital
expenditures,  debt service requirements or other purposes may be limited; (iii)
a substantial  portion of the Company's cash flow from operations,  if any, must
be dedicated to the payment of principal of and interest on its indebtedness and
other  obligations  and will  not be  available  for  other  purposes;  (iv) the
Company's level of indebtedness  could limit its flexibility in planning for, or
reacting  to changes  in, its  business;  (v) the  Company  will be more  highly
leveraged  than some of its  competitors,  which  may place it at a  competitive
disadvantage;  and (vi) the Company's high degree of  indebtedness  will make it
more vulnerable in the event of a downturn in its business.

POSSIBLE INABILITY TO SERVICE DEBT

         The Company has been  experiencing  increasing  negative EBITDA and the
Company's earnings before fixed charges were insufficient to cover fixed charges
for the year ended September 30, 1995 and the 13 months ended September 30, 1994
by $13.8 million and $3.0 million, respectively.  There can be no assurance that
the Company will be able to improve its earnings  before fixed charges or EBITDA
or that the Company  will be able to meet its debt service  obligations.  As the
Company does not  currently  have a revolving  credit  facility,  if a shortfall
occurs,  alternative  financing  would be  necessary in order for the Company to
meet  its  liquidity  requirements  and  there  can be no  assurance  that  such
financing would be available.  In such event, the Company could face substantial
liquidity problems.  The $17.5 million of indebtedness  outstanding at March 31,
1996  under the Tomen  Facility,  the $27.0  million of  financing  subsequently
approved and the additional $38.3 million of debt financing  proposals currently
submitted to Tomen  America,  if approved,  will mature prior to 2005 and future
borrowings,  including  potential  borrowings  of up to $16.2  million under the
Tomen Facility (to the extent projects are approved),  may mature prior to 2005.
Accordingly,  the  Company  may  have  to  refinance  a  substantial  amount  of
indebtedness  prior to the  maturity  of the Notes.  In  addition,  the  Company
anticipates  that cash flow from  operations  may be  insufficient  to repay the
Notes in full at maturity and the Notes may need to be refinanced.  There can be
no assurance that the Company will be able to refinance such  indebtedness.  The
ability of the Company to meet its obligations and to

                                      -14-
<PAGE>
effect such refinancings will be dependent upon, among other things,  the future
performance  of the  Company,  which  will be  subject  to  prevailing  economic
conditions  and to  financial,  business and other  factors,  including  factors
beyond  the  control  of  the  Company.  Failure  by the  Company  to  meet  its
obligations could result in a default on its indebtedness,  including the Notes,
which would permit the holders of such  indebtedness  to accelerate the maturity
thereof. Such events would make payments on the Notes less likely.

ACCELERATION OF DEBT IN THE EVENT OF A CHANGE OF CONTROL

         The  Indenture  provides  that in the event of a Change of Control  (as
hereinafter  defined),  including a "person" or "group"  becoming  the  ultimate
"beneficial  owner" of voting  stock  representing  more than 30% of the  voting
stock of GST, GST USA must make an offer to repurchase  the Notes at 101% of the
Accreted Value thereof,  plus accrued interest.  It is highly unlikely that cash
flow from operations  would be sufficient or that adequate funds would otherwise
be  available  to repay  the  Notes in full,  and  therefore,  GST USA  would be
required to refinance  the Notes.  There can be no assurance  that GST USA could
effect such refinancing on terms acceptable to it.

   
EFFECTIVE SUBORDINATION OF NOTES AS A RESULT OF HOLDING COMPANY STRUCTURE
    

         GST and GST USA are each holding companies.  The principal asset of GST
consists  of the  common  stock  of GST USA and the  principal  asset of GST USA
consists of the common stock of its subsidiaries. GST and GST USA intend to loan
or contribute a substantial portion of the net proceeds of the December Offering
to certain of GST USA's  subsidiaries.  GST and GST USA must rely upon dividends
and other payments from GST USA's  subsidiaries  to generate the funds necessary
to meet their obligations, including the payment of principal of and interest on
the Notes. The subsidiaries,  however, are legally distinct from GST and GST USA
and have no obligation,  contingent or otherwise, to pay amounts due pursuant to
the Notes or to make funds  available for such payment.  GST USA's  subsidiaries
have not guaranteed  the Notes.  The ability of GST USA's  subsidiaries  to make
such  payments to GST USA and GST will be subject to,  among other  things,  the
availability  of  funds,  the  terms  of  such  subsidiaries'  indebtedness  and
applicable state laws.  Pursuant to a credit agreement under the Tomen Facility,
GST USA's  subsidiary  that owns and  operates  the San  Bernardino  and Ontario
networks  may not pay any  dividends  or make any  distributions  on its capital
stock.  Subsequent  network  financings under the Tomen Facility are expected to
include  similar  prohibitions.  Claims of creditors of GST USA's  subsidiaries,
including trade creditors, will generally have priority as to the assets of such
subsidiaries  over the claims of GST USA,  GST and the  holders of GST USA's and
GST's  indebtedness,  including the Notes and the Notes Guarantee.  Accordingly,
the Notes and the Guarantee will be effectively  subordinated to the liabilities
(including  trade  payables) of the  subsidiaries of GST USA. At March 31, 1996,
the  subsidiaries  of GST USA had  approximately  $31.7  million of  liabilities
(excluding intercompany payables),  including $19.9 million of indebtedness, all
of which was secured.

ABILITY TO INCUR ADDITIONAL SECURED INDEBTEDNESS

         The  Notes  are  senior  unsecured  indebtedness  of GST  USA  and  are
guaranteed on a senior  unsecured  basis by GST. At March 31, 1996,  the Company
had an  aggregate  of  approximately  $19.9  million  of  secured  indebtedness,
including $17.5 million of indebtedness under the Tomen Facility. The subsidiary
that owns and operates the San  Bernardino  and Ontario  Networks has granted to
Tomen America a first priority lien on all of its assets, and its stock has been
pledged to Tomen America.  Under the terms of the Tomen Facility, in addition to
the $65.3 million of debt financing  currently  submitted to Tomen  America,  an
additional  $16.2  million  of  indebtedness  could  be  incurred  to  fund  the
development and construction of additional networks, including those planned for
Fresno and Contra  Costa/Alameda  Counties,  if and to the extent that proposals
for the  funding  of such  networks  are  approved  by Tomen  America.  Any such
subsequent  financings  under the Tomen Facility are expected to be secured in a
similar manner.  In addition,  pursuant to the terms of the Tomen Facility,  the
cash flow from each network Tomen America  finances will secure each other Tomen
America  network  financing.  The  Indenture  also  permits the Company to incur
additional  secured   indebtedness.   See  "Description  of  the  New  Notes  --
Covenants."


                                      -15-
<PAGE>
   
  SUBORDINATION OF NOTES TO SECURED INDEBTEDNESS

         In the event that a default  were to occur with  respect to any secured
indebtedness  incurred by the Company and the holders  thereof were to foreclose
on the collateral, the holders of such indebtedness would be entitled to payment
out of the  proceeds  of  their  collateral  prior  to any  holders  of  general
unsecured indebtedness, including the Notes, notwithstanding the existence of an
event of default  with  respect to the  Notes.  In the event of any  bankruptcy,
liquidation or  reorganization of the Company,  holders of secured  indebtedness
would  have a claim,  prior to the claim of the  Holders  of the  Notes,  on the
assets of the Company  securing such  indebtedness.  In addition,  to the extent
that the value of such  collateral  is  insufficient  to  satisfy  such  secured
indebtedness,   holders  of  amounts  remaining   outstanding  on  such  secured
indebtedness (as well as other unsubordinated creditors of the Company) would be
entitled to share PARI PASSU with Holders of the Notes with respect to any other
assets of the Company.  Assets  remaining  after  satisfaction  of the claims of
holders of secured  indebtedness may not be sufficient to pay amounts due on any
or all of the Notes then outstanding.
    

DIFFICULTIES IN IMPLEMENTING SWITCHED AND ENHANCED SERVICES STRATEGY

         The Company  plans to deploy  high  capacity,  digital  switches in the
cities in which it operates or plans to operate competitive access networks,  as
well as in certain  cities  where the Company  will rely on LEC  facilities  for
transmission.  This will enable the Company to offer interstate  switched access
services and, as  regulatory  conditions  permit,  intrastate  switched  access,
enhanced  services  and full local  dial tone.  The  Company's  switched  access
services  strategy may not be profitable  due to, among other  factors,  lack of
customer demand, competition from other CAPs and pricing pressure from the LECs.
Implementation  of the Company's  switched and enhanced  services  strategy will
depend,  in large  part,  on the  Company's  ability  to obtain  vendor or other
financing for switches.  There can be no assurance  that the Company will secure
adequate  financing for its planned  deployment of switches,  that all or any of
such  switches  will be deployed or that,  if deployed,  such  switches  will be
utilized  to the degree  contemplated  by the  Company.  The Company has limited
experience  providing  switched  services and there can be no assurance that the
Company  will  be able to  successfully  implement  its  switched  and  enhanced
services strategy.

FINANCIAL AND OPERATING RESTRICTIONS IMPOSED BY EXISTING INDEBTEDNESS

         The Indenture and the Tomen Facility impose  significant  operating and
financial  restrictions on the Company. Such restrictions affect, and in certain
cases  significantly  limit or prohibit,  among other things, the ability of the
Company to incur  additional  indebtedness  or create  liens on its assets,  pay
dividends,  sell assets,  engage in mergers or acquisitions or make investments.
Failure to comply with any such covenant  could result in a default  thereunder,
which could result in an acceleration of the Notes, in which case the Holders of
the Notes may not be paid.

RECENT COMMENCEMENT OF MARKETING

         The Company has only recently  begun  marketing the services of certain
of its competitive  access networks and as a result,  the Company has relatively
few customers and has generated  limited revenue.  Although the Company actively
markets its products and  services,  there can be no assurance  that the Company
will be able to attract new customers or retain existing customers.

DEPENDENCE ON KEY CUSTOMERS

         The  Company's  five  largest  telecommunications   services  customers
accounted  for  approximately  16.6%  and  0.7%  of the  Company's  consolidated
revenues for the year ended September 30, 1995 and the 13 months ended September
30, 1994,  respectively.  During the year ended September 30, 1995, one of ITG's
former  customers,  which is presently  the subject of a bankruptcy  proceeding,
accounted for 5.3% of the Company's  consolidated  revenues.  It is  anticipated
that during the early  stages of  development  of  individual  networks,  before
obtaining a

                                      -16-
<PAGE>
sufficient  amount of end-user  revenues,  the Company  will be  dependent  on a
limited  number of long  distance  carriers  for a  significant  portion  of its
revenues.  While long distance  carriers have high volume  requirements and have
utilized CAPs as  alternative  access  providers,  they generally are more price
sensitive  than  end-users.   The  five  largest   customers  of  the  Company's
manufacturing  operations  accounted  for  22.8%  and  22.2%  of  the  Company's
consolidated  revenues for the year ended  September  30, 1995 and the 13 months
ended  September  30, 1994,  respectively.  The loss of, or decrease of business
from, one or more significant  customers could have a material adverse effect on
the business, financial condition and results of operations of the Company.

COMPETITION

         The telecommunications industry is highly competitive. In most markets,
the Company's  networks'  principal  competitor  is the regional Bell  operating
company ("RBOC") or the GTE Operating  Company  ("GTOC").  Other competitors may
include   other   CAPs,    microwave   and    satellite    carriers,    wireless
telecommunications  providers  and private  networks  built by large  end-users.
Potential  competitors (using similar or different  technologies)  include cable
television  companies,  utilities and local  telephone  companies  outside their
current  local  service  areas.  In  addition,  the Company  anticipates  future
competition from large long distance carriers,  such as AT&T Corp. ("AT&T"), MCI
Communications Corporation ("MCI") and Sprint Corporation ("Sprint"), which have
announced plans to offer integrated  local and long distance  telecommunications
services as regulations allow. Consolidation of telecommunications companies and
the formation of strategic alliances within the telecommunications  industry, as
well as the development of new technologies,  could give rise to significant new
competitors to the Company.

         As a  recent  entrant  in the  integrated  telecommunications  services
industry,  the  Company  has not  achieved  and does not  expect  to  achieve  a
significant  market share for its competitive access and long distance services.
In particular,  the RBOCs,  the GTOCs and other local  telephone  companies have
long-standing relationships with their customers, have financial,  technical and
marketing resources  substantially  greater than those of the Company,  have the
potential to subsidize  competitive  services  with  revenues  from a variety of
businesses and currently  benefit from certain  existing  regulations that favor
the  LECs  over  the  Company  in  certain  respects.  While  recent  regulatory
initiatives,  which  allow CAPs such as the Company to  interconnect  with local
telephone company facilities,  provide increased business  opportunities for the
Company,  such interconnection  opportunities have been accompanied by increased
pricing  flexibility  for and  relaxation of  regulatory  oversight of the local
telephone  companies.  If regulators  allow local  telephone  companies to lower
their rates,  engage in increased  discount pricing  practices or seek to charge
CAPs increased fees in conjunction with  interconnection to their networks,  the
financial  condition of the Company  could be adversely  affected.  In September
1995, the FCC announced proposals that, if adopted,  would significantly  lessen
the  regulation of LECs that are subject to  competition  in their service areas
and would provide such LECs with greater pricing flexibility.  If the LECs lower
their rates, CAPs such as the Company and other telecommunications providers may
be forced by market  conditions  to charge  less for their  services in order to
compete.  There can be no assurance  that the Company will be able to achieve or
maintain significant revenue or compete effectively in any of its markets.

         The  long   distance   telecommunications   industry   has   relatively
insignificant  barriers  to  entry,  numerous  entities  competing  for the same
customers  and a high average churn rate,  as customers  frequently  change long
distance  providers  in response to the  offering of lower rates or  promotional
incentives by  competitors.  The Company  competes  with major  carriers such as
AT&T,  MCI and Sprint,  as well as other  national  and regional  long  distance
carriers and resellers,  many of whom are able to provide services at costs that
are  lower  than the  Company's  current  costs.  As  procompetitive  regulatory
initiatives are  implemented,  the Company  believes that RBOCs also will become
competitors  in the  long  distance  telecommunications  industry.  The  Company
believes  that the  principal  competitive  factors  affecting its long distance
operations  are pricing,  customer  service,  accurate  billing,  clear  pricing
policies  and,  to a lesser  extent,  variety of  services.  The  ability of the
Company  to  compete  effectively  will  depend  upon its  continued  ability to
maintain high quality,  market driven  services at prices  generally equal to or
below those charged by its competitors.  The FCC has, on several occasions since
1984,  approved or required price reductions by AT&T. The FCC recently announced
a decision pursuant to which AT&T will no longer be regulated as a dominant long
distance  carrier.  This decision  removes AT&T from price-cap  regulations with
respect to its long distance services

                                      -17-

<PAGE>
as well as other  regulatory and reporting  requirements  that  previously  only
applied to AT&T as the sole  carrier  designated  by the FCC as  dominant in the
long  distance  market.  This  decision,  which  is  subject  to  certain  other
commitments and  undertakings  agreed to by AT&T, is expected to increase AT&T's
flexibility  in  competing  in  the  long  distance   services  market  and,  in
particular,  will  eliminate the longer tariff  notice  requirements  previously
applicable  only to AT&T.  To  maintain  its  competitive  posture,  the Company
believes  that it must be in a  position  to reduce  its prices in order to meet
reductions in rates,  if any, by others.  Any such  reductions  could  adversely
affect the Company.

         NACT competes with other lower to medium capacity switch  manufacturers
and  software  providers.   As  its  business  develops  and  new  switches  are
introduced,  NACT's competitors may include larger switch and telecommunications
equipment  manufacturers such as AT&T, Harris Corp., Siemens AG, Alcatel Alsthom
Compagnie Generale D'Electricite, Telefonaktiebolaget L.M. Ericsson and Northern
Telecom,  Ltd. Most of NACT's potential  competitors have substantially  greater
financial,  technical  and  marketing  resources  than NACT and may threaten the
viability  of NACT if such other  companies  commence  efforts to compete in the
segment of the switch manufacturing market in which NACT operates.

GOVERNMENT REGULATION

         FOREIGN  OWNERSHIP   RESTRICTIONS.   The  Company's  networks  and  the
provision  of switched  and private  line  services  are subject to  significant
regulation at the federal,  state and local levels. As such, delays in receiving
required  regulatory  approvals or the  enactment of new adverse  regulation  or
regulatory  requirements  may have a material  adverse  effect upon the Company.
While the Company is not subject to  extensive  rate  regulation  by the FCC, it
must file tariffs for its  interstate and  international  services and the rates
for these services must be reasonable. In addition, the FCC imposes restrictions
on  foreign  ownership  of  communications  service  providers  utilizing  radio
frequencies  and  regulates  international  service  providers  affiliated  with
dominant foreign carriers. The operations of the Company's Hawaiian network use,
among  other  transmission  facilities,  microwave  radio  facilities  operating
pursuant to FCC licenses granted to Pacwest  Network,  Inc.  ("PNI"),  an entity
that is controlled by John Warta,  the Company's  President and Chief  Executive
Officer.

         The  FCC  may  also  have  the  authority,  which  it is not  presently
exercising,  to impose  restrictions  on  foreign  ownership  of  communications
service providers not utilizing radio  frequencies,  which could have a material
adverse effect on the Company's  competitive  access business and other domestic
services businesses.

         FEDERAL  REGULATION.  The FCC  also  exercises  jurisdiction  over  the
Company  to the extent its  services  involve  the  provision,  origination  and
termination of interstate or international telecommunications,  including resale
of long  distance  services.  Thus,  as such a provider,  the Company  must file
tariffs  with the FCC and/or  obtain  prior FCC  authorization  for domestic and
international long distance services on an ongoing basis.  Legislation  recently
enacted by the U.S.  Congress  provides for a  significant  deregulation  of the
domestic  telecommunications   industry,  including  the  local  exchange,  long
distance and cable  television  industries.  There can be no assurance  that any
legislation  or  regulation  will  broaden the  opportunities  available  to the
Company  or will not have a  material  adverse  effect  on the  Company  and its
operations.

         STATE AND  LOCAL  REGULATION.  State  regulatory  commissions  exercise
jurisdiction over the Company to the extent it provides intrastate services.  As
such a  provider,  the  Company  will be  required  in  most  states  to  obtain
regulatory  authorization and/or file tariffs at state agencies. There can be no
assurance that state or federal commissions will grant such authority or refrain
from taking action against any of the companies found to have provided  services
without obtaining the necessary authorizations.  If authority is not obtained or
if tariffs are not filed,  or are not updated,  or otherwise do not fully comply
with the tariff  filing  rules of the FCC or state  regulatory  agencies,  third
parties or regulators could challenge these actions. Such challenges could cause
the  Company  to incur  substantial  legal and  administrative  expenses.  State
regulatory agencies regulate competitive access services to the extent that they
are used for  intrastate  communications,  and in some states local  authorities
control the Company's

                                      -18-
<PAGE>
access to municipal rights-of-way. The Company expects that, as its business and
services expand and as more procompetitive  regulatory initiatives pertaining to
the local  telecommunications  services industry are implemented,  it will offer
increased  intrastate services (including  intrastate switched services),  which
will be subject to state regulation.  There can be no assurance that regulations
that would  permit the Company to provide  additional  access  services  will be
enacted on a timely basis,  if at all. The networks are also subject to numerous
local regulations such as building codes and licensing. Such regulations vary on
a city by city and county by county basis.

IMPEDIMENTS TO ENFORCEMENT OF GUARANTEE BY A CANADIAN CORPORATION

         GST is  incorporated  in Canada.  Certain  directors and officers,  and
certain experts named herein,  are residents of Canada.  As a result,  it may be
difficult for U.S.  noteholders to seek  enforcement  of the Notes  Guarantee by
effecting  service of process  within  the United  States  upon GST or upon such
directors,  officers  and  experts  or  to  collect  judgments  of  U.S.  courts
predicated upon civil liability  under U.S.  federal  securities and other laws.
GST believes that there is substantial doubt as to whether Canadian courts would
(i) enforce  judgments of U.S.  courts  obtained  against GST or such directors,
officers and experts  predicated upon the civil  liabilities  provisions of U.S.
laws  or  (ii)  impose  liabilities  in  original  actions  against  GST  or its
directors, officers and experts predicated solely upon U.S. securities laws.

DIFFICULTY IN ADAPTING TO TECHNOLOGICAL CHANGE

         The  telecommunications  industry  is subject to rapid and  significant
changes  in  technology,  with the  Company  relying  on third  parties  for the
development  of and  access  to new  technology.  The  effect  of  technological
changes,  including changes to wireline and wireless transmission  technologies,
on the business of the Company  cannot be  predicted.  The Company  believes its
future  success will depend,  in part,  on its ability to anticipate or adapt to
such  changes  and to offer,  on a timely  basis,  services  that meet  customer
demands.

         The future success of NACT will depend in part upon its ability to keep
pace with advancing  technology and standards within the industry.  There can be
no  assurance  that  NACT's  products  will not be  rendered  obsolete by switch
products  incorporating  technological advances designed by competitors that are
not available to NACT.

POSSIBLE ADVERSE LITIGATION OUTCOME

         An action  was  commenced  against  NACT  alleging  that its  telephone
systems  incorporating prepaid calling features infringe upon a patent issued in
1987.  An  unfavorable  decision  in this action  could have a material  adverse
effect on the Company.

         The Company has been  involved  in  litigation  with the City of Tucson
relating to the Company's  license to operate a network there. The likely result
of such  litigation  will be to require the Company to obtain a new license with
less favorable provisions to expand the Tucson network.

DEPENDENCE ON KEY PERSONNEL

         The efforts of a small number of key management and operating personnel
will largely determine the Company's success and the loss of any of such persons
could adversely  affect the Company.  The success of the Company also depends in
part upon its ability to hire and retain highly skilled and qualified operating,
marketing,  financial and technical  personnel.  The  competition  for qualified
personnel in the telecommunications industry is intense and, accordingly,  there
can be no assurance  that the Company  will be able to hire or retain  necessary
personnel.


                                      -19-

<PAGE>
DEPENDENCE ON RIGHTS-OF-WAY AND OTHER THIRD PARTY AGREEMENTS

         The Company must obtain  easements,  rights-of-way,  entry to premises,
franchises  and licenses  from various  private  parties,  actual and  potential
competitors  and state and local  governments  in order to construct and operate
its  networks.   There  can  be  no  assurance  that  the  Company  will  obtain
rights-of-way  and franchise  agreements on acceptable  terms or that current or
potential  competitors  will not  obtain  similar  rights-of-way  and  franchise
agreements  that will allow them to compete  against the Company.  If any of the
existing  franchise or license agreements were terminated or not renewed and the
Company  were forced to remove its fiber optic cables or abandon its networks in
place, such termination could have a material adverse effect on the Company.

   
  POSSIBLE RECOGNITION OF ADDITIONAL ORIGINAL ISSUE DISCOUNT
    

         No gain or loss will be  recognized  by an  exchanging  Holder  upon an
exchange of the Old Notes for the New Notes.  A Holder's  basis in the New Notes
will be the  same as the  Holder's  basis  in the Old  Notes,  and the  Holder's
holding  period in the New Notes will  include the period  during  which the Old
Notes had been held by the Holder.  If the exchange of the Old Notes for the New
Notes were deemed by the Internal  Revenue Service (the "Service") to constitute
the  exchange  of a debt  instrument  for a modified  instrument  that  differed
materially either in kind or in extent, additional original issue discount could
arise. However,  under Proposed Regulations issued by the Service, the New Notes
should not be deemed to constitute a modification of the Old Notes,  inasmuch as
the New  Notes  reflect  all of the  terms  and  conditions  of the Old Notes in
registered form, which  registration  results from the original terms of the Old
Notes.  Hence,  the  discussion  that  follows  will be based on the  terms  and
conditions of issuance of the Old Notes.

ORIGINAL ISSUE DISCOUNT

         The  Old  Notes  were  issued  at a  substantial  discount  from  their
principal  amount at maturity.  Although  cash interest will not accrue prior to
December 2000, and there will be no periodic  payments of cash interest prior to
June 2001, original issue discount (the difference between the stated redemption
price at  maturity  and the issue  price of the Old Notes)  will accrue from the
issue date of the Old Notes.  Original  issue  discount  will be  includible  as
interest  income  periodically  (including  for periods ending prior to December
2000) in a U.S.  Holder's (as defined  herein)  gross  income for United  States
federal  income tax purposes in advance of receipt of the cash payments to which
the income is attributable.

         In the [unlikely] event that the Notes are treated as equity, (i) there
would be no original issue discount and periodic distributions beginning in June
2001 (or earlier with respect to increases in Accreted  Value,  would be taxable
as  dividends to the Holders (to the extent GST USA has earnings and profits for
United States federal income tax  purposes),  (ii) Non-U.S.  Holders (as defined
herein) of Notes would not be eligible for the portfolio interest exemption from
United  States  withholding  tax and such  dividends  would be subject to United
States  withholding  tax at a flat rate of 30% (or lower  treaty rate) and (iii)
GST USA would not be able to deduct  interest or any original  issue discount on
the Notes.

         If a  bankruptcy  case  under  the  U.S.  Bankruptcy  Code  were  to be
commenced  by or against  GST or GST USA after the  issuance  of the Notes,  the
claim of a Holder of Notes with respect to the principal  amount  thereof may be
limited to an amount equal to the sum of (i) the initial offering price and (ii)
that portion of the original  issue  discount  that is not deemed to  constitute
"unmatured  interest"  for purposes of the U.S.  Bankruptcy  Code.  Any original
issue  discount  that was not  amortized  as of the time of any such  bankruptcy
filing would constitute "unmatured interest."

POSSIBLE UNFAVORABLE TAX AND OTHER LEGAL CONSEQUENCES FOR HOLDERS OF NOTES AND 
THE COMPANY

         Based  upon  their  yield,  the Notes will be subject to the high yield
discount obligation rules. Under these rules, GST USA will not be able to deduct
original issue discount attributable to the Notes until paid. Moreover,

                                      -20-

<PAGE>
because the yield on the Notes will exceed the applicable  federal rate plus six
percentage  points as of the date of issuance of the Old Notes, a portion of the
original issue discount attributable to the Notes will not be deductible at all.
Therefore,  GST USA's  after  tax cash  flow will be less than if such  original
issue discount were deductible in full when accrued. In addition, as a result of
the Notes Guarantee, and possibly because of future acquisitions, other U.S. tax
provisions may limit the deductibility of a portion of the interest and original
issue discount on the Notes.

         See "Certain  United States  Federal Income Tax  Considerations"  for a
more detailed discussion of the United States federal income tax consequences to
the holders of Notes  regarding the purchase,  ownership and  disposition of the
Notes.

PROBABLE INABILITY TO UTILIZE NET OPERATING LOSS

         At  September  30,  1995,  the Company had a U.S.  net  operating  loss
carryforward  of  approximately  $8.5 million and Canadian  net  operating  loss
carryforward of approximately  $5.8 million.  While such loss  carryforwards are
available to offset future taxable income of the Company, it is more likely than
not that the  Company  will not  generate  sufficient  taxable  income  so as to
utilize all or a portion of such loss carryforwards prior to their expiration.

VARIABILITY OF QUARTERLY OPERATING RESULTS

         As a result of the limited revenues and significant expenses associated
with the expansion  and  development  of its networks and services,  the Company
anticipates that its operating results could vary  significantly  from period to
period. In addition,  revenues relating to the Company's network  businesses are
and may continue to be dependent upon a small number of customers and contracts,
revenues under which are likely to vary significantly from period to period.

RISK OF JOINT INVESTMENTS

         The Company's Phoenix network is operated by Phoenix Fiber Access, Inc.
("Phoenix Fiber"),  an entity in which the Company has a 50% ownership interest.
Phoenix Fiber is managed by a governing board that the Company does not control.
The risk is present in this joint venture,  and in other joint ventures in which
the Company may  subsequently  determine  to  participate,  that the other joint
venture  partner may at any time have economic,  business or legal  interests or
goals that are inconsistent with those of the joint venture or the Company.  The
risk is also  present  that a joint  venture  partner  may be unable to meet its
economic  or other  obligations  to the  venture  and that  the  Company  may be
required to fulfill those obligations.

POTENTIAL RESALES OF A SUBSTANTIAL NUMBER OF SHARES; REGISTRATION RIGHTS

         At March 31,  1996,  the  Company  had  outstanding  20,824,901  Common
Shares,  of which  approximately  19,583,729  shares  were  freely  transferable
without restriction or further registration under the Securities Act, except for
(i)  2,468,476  Common  Shares held by  "affiliates"  of the Company  within the
meaning of Rule 144 under the  Securities  Act,  which shares are subject to the
resale  limitations  of Rule 144,  (ii) an  aggregate of 750,000  Common  Shares
subject to escrow under  regulations  of the Vancouver  Stock Exchange and (iii)
1,000,000  Common  Shares  subject  to  escrow  as  described  in the  following
paragraph.  The remaining 1,241,172 Common Shares were "restricted  securities,"
as that  term  is  defined  in Rule  144  and  may  only be sold  pursuant  to a
registration  statement under the Securities Act or an applicable exemption from
registration  thereunder,  including  pursuant to Rule 144.  At March 31,  1996,
1,982,732  Common Shares were reserved for issuance upon exercise of outstanding
warrants  and options,  including  warrants to purchase  375,000  shares held by
Tomen and Tomen America.  The resale of an aggregate of 1,636,500 of such Common
Shares has been registered under the Securities Act.


                                      -21-
<PAGE>
         The number of Common  Shares  outstanding  at March 31,  1996  includes
1,000,000 Common Shares held in escrow in connection with the acquisition of the
remaining 20% interest in GST Telecom Inc. from Pacwest Network LLC ("Pacwest").
The Company is obligated  to register for resale such Common  Shares (or portion
thereof) upon their release from escrow to Pacwest.  The Company  issued 168,249
Common Shares on January 5, 1996 and is committed to issue 168,249 Common Shares
on January 5, 1997 to former  shareholders  of NACT. The Company is committed to
register  for  resale  one-half  of such  shares.  Under  the terms of the Tomen
Facility,  Tomen and Tomen  America  have the right to purchase  250,000  Common
Shares and  warrants to purchase  125,000  Common  Shares upon the next  network
financing. The Company is obligated to register the resale of such shares.

LACK OF A PUBLIC MARKET

         The New  Notes  will  constitute  a new  issue  of  securities  with no
established trading market. GST USA does not intend to list the New Notes on any
national  securities  exchange or to seek  approval  for  quotation  through any
automated  quotation  system.  GST USA has been advised by MS&Co. that following
completion  of the Exchange  Offer,  MS&Co.  intends to make a market in the New
Notes.  However,  MS&Co.  is  not  obligated  to do  so  and  any  market-making
activities with respect to the New Notes may be discontinued at any time without
notice.  Accordingly,  no assurance  can be given that an active public or other
market will  develop for the New Notes or as to the  liquidity of or the trading
market  for the New  Notes.  If a  trading  market  does not  develop  or is not
maintained,  Holders of the New Notes may experience difficulty in reselling the
New Notes or may be unable  to sell them at all.  If a market  for the New Notes
develops, any such market may cease to continue at any time. If a public trading
market  develops for the New Notes,  future trading prices of the New Notes will
depend on many  factors,  including,  among other  things,  prevailing  interest
rates, the Company's results of operations and the market for similar securities
and other factors, including the financial condition of the Company.

CONSEQUENCES OF THE EXCHANGE OFFER TO NON-TENDERING HOLDERS OF THE OLD NOTES

         In the event the  Exchange  Offer is  consummated,  GST USA will not be
required to register  any Old Notes not  tendered  and  accepted in the Exchange
Offer. In such event, Holders of Old Notes seeking liquidity in their investment
would have to rely on  exemptions  to the  registration  requirements  under the
Securities Act. Following the Exchange Offer, none of the Notes will be entitled
to the  contingent  increase in interest  rate  provided  for (in the event of a
failure to consummate  the Exchange  Offer in  accordance  with the terms of the
Registration Rights Agreement) pursuant to the Registration Rights Agreement.


                                      -22-
<PAGE>
                               THE EXCHANGE OFFER

PURPOSE AND EFFECT OF THE EXCHANGE OFFER

         The Old Notes were sold by GST USA on December 19, 1995 to MS&Co.  (the
"Placement  Agent"),  which  placed  the Old Notes  with  certain  institutional
investors  in reliance on Section 4(2) of, and Rule 144A under,  the  Securities
Act. In  connection  with the sale of the Old Notes,  GST USA  entered  into the
Registration  Rights Agreement,  pursuant to which GST USA and GST agreed to use
their best efforts to  consummate an offer to exchange the Old Notes for the New
Notes  pursuant to an  effective  registration  statement  on or before June 19,
1996. A copy of the  Registration  Rights Agreement has been filed as an exhibit
to the Form 20-F. Unless the context requires otherwise,  the term "Holder" with
respect  to the  Exchange  Offer  means any  person in whose  name Old Notes are
registered  on the  books of GST USA or any  other  person  who has  obtained  a
properly  completed bond power from the registered  Holder,  or any person whose
Old Notes are held of record by DTC who  desires  to  deliver  such Old Notes by
book-entry transfer at DTC.

         GST  USA has  not  requested,  and  does  not  intend  to  request,  an
interpretation  by the staff of the  Commission  with respect to whether the New
Notes issued pursuant to the Exchange Offer in exchange for the Old Notes may be
offered  for  sale,  resold  or  otherwise  transferred  by any  Holder  without
compliance  with the  registration  and  prospectus  delivery  provisions of the
Securities  Act.  Based on  interpretations  by the staff of the  Commission set
forth in no-action  letters issued to third  parties,  GST USA believes that New
Notes  issued  pursuant to the  Exchange  Offer in exchange for Old Notes may be
offered for resale,  resold and otherwise  transferred by any Holder of such New
Notes  (other  than any such  Holder  that is an  "affiliate"  of GST USA or GST
within the meaning of Rule 405 under the  Securities  Act and except in the case
of broker-dealers,  as set forth below) without compliance with the registration
and prospectus delivery provisions of the Securities Act, provided that such New
Notes are acquired in the  ordinary  course of such  Holder's  business and such
Holder has no arrangement or understanding with any person to participate in the
distribution of such New Notes. Any Holder who tenders in the Exchange Offer for
the purpose of  participating  in a  distribution  of the New Notes or who is an
affiliate of GST USA or GST may not rely on such  interpretation by the staff of
the Commission  and must comply with the  registration  and prospectus  delivery
requirements  of the  Securities  Act in connection  with any  secondary  resale
transaction.  Each  broker-dealer that receives New Notes for its own account in
exchange for Old Notes, where such Old Notes were acquired by such broker-dealer
as a result  of  market-making  activities  or other  trading  activities,  must
acknowledge  that it will deliver a prospectus in connection  with any resale of
such New Notes. See "Plan of Distribution."

         By  tendering  in the  Exchange  Offer,  each  Holder of Old Notes will
represent  to GST  USA and GST  that,  among  other  things,  (i) the New  Notes
acquired  pursuant to the  Exchange  Offer are being  obtained  in the  ordinary
course of business of the person  receiving such New Notes,  whether or not such
person is such Holder,  (ii) neither the Holder of Old Notes, nor any such other
person,  has an arrangement or  understanding  with any person to participate in
the distribution of such New Notes,  (iii) if the Holder is not a broker-dealer,
or is a  broker-dealer  but will not  receive  New Notes for its own  account in
exchange  for Old Notes,  neither  the  Holder,  nor any such other  person,  is
engaged in or intends to participate in the  distribution  of such New Notes and
(iv) neither the Holder nor any such other person is an  "affiliate"  of GST USA
or GST  within  the  meaning  of Rule 405 under the  Securities  Act or, if such
Holder is an "affiliate," that such Holder will comply with the registration and
prospectus delivery requirements of the Securities Act to the extent applicable.

         Following the consummation of the Exchange Offer,  Holders of Old Notes
not  tendered  will not have any further  registration  rights and the Old Notes
will continue to be subject to certain  restrictions  on transfer.  Accordingly,
the liquidity of the market for the Old Notes could be adversely affected.

TERMS OF THE EXCHANGE OFFER

         Upon  the  terms  and  subject  to the  conditions  set  forth  in this
Prospectus and in the Letter of Transmittal, GST USA will accept any and all Old
Notes validly tendered and not withdrawn prior to 5:00 p.m., New York City time,
on the Expiration Date. Subject to the minimum denomination  requirements of the
New Notes,  GST USA will issue $1,000  principal amount at maturity of New Notes
in exchange for each $1,000 principal amount at

                                      -23-

<PAGE>
maturity of outstanding  Old Notes accepted in the Exchange  Offer.  Holders may
tender some or all of their Old Notes pursuant to the Exchange  Offer.  However,
Old Notes may be tendered only in integral  multiples of $1,000 principal amount
at maturity.

         The forms and terms of the New Notes will be  identical in all material
respects to the forms and terms of the corresponding Old Notes,  except that the
offer and sale of the New Notes will have been  registered  under the Securities
Act and, therefore, the New Notes will not bear legends restricting the transfer
thereof.  The  Exchange  Offer is not  conditioned  upon any  minimum  aggregate
principal  amount at maturity of Old Notes being  tendered for  exchange.  As of
March 31, 1996,  $166,327,787  Accreted Value of the Old Notes were outstanding.
This Prospectus,  together with the Letter of Transmittal,  is being sent to all
Holders as of ________, 1996.

         Holders of Old Notes do not have any  appraisal or  dissenters'  rights
under the Indenture in connection  with the Exchange  Offer.  GST USA intends to
conduct the Exchange Offer in accordance with the applicable requirements of the
Exchange  Act  and  the  applicable  rules  and  regulations  of the  Commission
thereunder.

         GST USA shall be deemed to have  accepted  validly  tendered  Old Notes
when, as and if GST USA has given oral or written notice thereof to the Exchange
Agent.  The Exchange  Agent will act as agent for the tendering  Holders for the
purpose of  receiving  the New Notes from GST USA. If any tendered Old Notes are
not  accepted for  exchange  because of an invalid  tender,  the  occurrence  of
certain other events set forth herein or otherwise,  such  unaccepted  Old Notes
will be returned,  without expense,  to the tendering Holder thereof as promptly
as practicable after the Expiration Date.

         Holders who tender Old Notes in the Exchange Offer will not be required
to pay brokerage  commissions  or fees or,  subject to the  instructions  in the
Letter of Transmittal,  transfer taxes with respect to the exchange of Old Notes
pursuant to the Exchange Offer. GST USA will pay all charges and expenses, other
than certain  applicable  taxes, in connection with the Exchange Offer. See " --
Fees and Expenses."

EXPIRATION DATE; EXTENSIONS; AMENDMENTS

         The term "Expiration Date" shall mean 5:00 p.m., New York City time, on
_____________,  1996, [20 BUSINESS DAYS AFTER THE  COMMENCEMENT  OF THE EXCHANGE
OFFER] unless GST USA in its sole  discretion,  extends the Exchange  Offer,  in
which case the term  "Expiration  Date"  shall mean the latest  date and time to
which the Exchange Offer is extended.  Although GST USA has no current intention
to extend the Exchange Offer,  GST USA reserves the right to extend the Exchange
Offer at any time and from time to time by giving oral or written  notice to the
Exchange Agent and by timely public announcement communicated,  unless otherwise
required by applicable law or  regulation,  by making a release to the Dow Jones
News  Service.  During  any  extension  of the  Exchange  Offer,  all Old  Notes
previously tendered pursuant to the Exchange Offer and not withdrawn will remain
subject to the Exchange Offer. The date of the exchange of the New Notes for Old
Notes will be the first AMEX trading day following the Expiration Date.

         GST USA  expressly  reserves  the right to (i)  terminate  the Exchange
Offer and not accept for  exchange  any Old Notes if any of the events set forth
below under " -- Conditions to the Exchange Offer" shall have occurred and shall
not have been waived by GST USA and (ii) amend the terms of the  Exchange  Offer
in any manner that, in its good faith  judgment,  is advantageous to the Holders
of the Old Notes, whether before or after any tender of the Old Notes.

PROCEDURES FOR TENDERING

         The tender to GST USA of Old Notes by a Holder thereof  pursuant to one
of the  procedures  set forth below will  constitute  an agreement  between such
Holder and GST USA in  accordance  with the terms and subject to the  conditions
set forth  herein  and in the Letter of  Transmittal  signed by such  holder.  A
Holder of the Old Notes may tender such Old Notes by (i) properly completing and
signing a Letter of Transmittal or a facsimile  thereof (all  references in this
Prospectus  to a Letter of  Transmittal  shall be deemed to include a  facsimile
thereof) and delivering the same, together with any corresponding certificate or
certificates representing the Old Notes being tendered (if in certificated form)
and any required signature guarantees,  to the Exchange Agent at its address set
forth in the

                                      -24-

<PAGE>
Letter of Transmittal on or prior to the Expiration  Date (or complying with the
procedure for book-entry  transfer  described  below) or (ii) complying with the
guaranteed delivery procedures described below.

         If tendered Old Notes are  registered  in the name of the signer of the
Letter of Transmittal and the New Notes to be issued in exchange therefor are to
be issued (and any  untendered  Old Notes are to be reissued) in the name of the
registered holder (which term, for the purposes described herein,  shall include
any participant in DTC whose name appears on a security  listing as the owner of
Old Notes),  the signature of such signer need not be  guaranteed.  In any other
case,  the  tendered  Old Notes  must be  endorsed  or  accompanied  by  written
instruments of transfer in form satisfactory to GST USA and duly executed by the
registered Holder and the signature on the endorsement or instrument of transfer
must be guaranteed by a member firm of a registered national securities exchange
or of the National Association of Securities Dealers, Inc., a commercial bank or
trust  company  having an office or  correspondent  in the  United  States or an
"eligible  guarantor  institution" as defined by Rule 17Ad-15 under the Exchange
Act (any of the foregoing hereinafter referred to as an "Eligible Institution").
If the New Notes  and/or the Old Notes not  exchanged  are to be delivered to an
address other than that of the registered  Holder  appearing on the register for
the Old Notes,  the signature in the Letter of Transmittal must be guaranteed by
an Eligible Institution.

         THE METHOD OF  DELIVERY  OF OLD NOTES,  LETTER OF  TRANSMITTAL  AND ALL
OTHER  DOCUMENTS IS AT THE ELECTION AND RISK OF THE HOLDER.  IF SUCH DELIVERY IS
BY MAIL, IT IS RECOMMENDED THAT REGISTERED MAIL,  PROPERLY INSURED,  WITH RETURN
RECEIPT REQUESTED,  BE USED. IN ALL CASES,  SUFFICIENT TIME SHOULD BE ALLOWED TO
ASSURE TIMELY DELIVERY.  NO LETTER OF TRANSMITTAL OR OLD NOTES SHOULD BE SENT TO
GST USA.

         GST USA  understands  that  the  Exchange  Agent  will  make a  request
promptly after the date of this  Prospectus to establish an account with respect
to the Old Notes at DTC for the purpose of facilitating  the Exchange Offer, and
subject  to the  establishment  thereof,  any  financial  institution  that is a
participant in DTC's system may make book-entry delivery of Old Notes by causing
DTC to transfer such Old Notes into the Exchange Agent's account with respect to
the Old Notes in accordance  with DTC's  procedure for such  transfer.  Although
delivery of the Old Notes may be effected through  book-entry  transfer into the
Exchange  Agent's account at DTC, an appropriate  Letter of Transmittal with any
required  signature  guarantee and all other revised documents must in each case
be transmitted to and received or confirmed by the Exchange Agent at the address
set forth in the Letter of Transmittal  on or prior to the Expiration  Date, or,
if the guaranteed delivery procedures  described below are complied with, within
the time period provided under such procedures.

         If the Holder  desires to accept the  Exchange  Offer and time will not
permit a Letter of  Transmittal  or Old Notes to reach the Exchange Agent before
the Expiration Date or the procedure for book-entry transfer cannot be completed
on a timely basis,  a tender may be effected if the Exchange  Agent has received
at its  office,  on or prior to the  Expiration  Date,  a  letter,  telegram  or
facsimile  transmission from an Eligible  Institution setting forth the name and
address  of the  tendering  Holder,  the  name(s)  in which  the Old  Notes  are
registered and the  certificate  number(s) of the Old Notes to be tendered,  and
stating  that the tender is being made  thereby and  guaranteeing  that,  within
three AMEX trading days after the date of execution of such letter,  telegram or
facsimile  transmission by the Eligible  Institution,  such Old Notes, in proper
form for transfer (or a  confirmation  of book-entry  transfer of such Old Notes
into the Exchange  Agent's  account at DTC),  will be delivered by such Eligible
Institution  together  with a properly  completed  and duly  executed  Letter of
Transmittal (and any other required documents).  Unless Old Notes being tendered
by the  above-described  method are deposited with the Exchange Agent within the
time period set forth  above  (accompanied  or preceded by a properly  completed
Letter of  Transmittal  and any other required  documents),  GST USA may, at its
option, reject the tender. Copies of a Notice of Guaranteed Delivery,  which may
be used by Eligible  Institutions for the purposes  described in this paragraph,
are available from the Exchange Agent.

         A tender  will be deemed to have been  received as of the date when (i)
the tendering  Holder's properly completed and duly signed Letter of Transmittal
accompanied by the Old Notes (or a confirmation  of book-entry  transfer of such
Old Notes into the Exchange Agent's account at DTC), is received by the Exchange
Agent or (ii) a Notice of Guaranteed  Delivery or letter,  telegram or facsimile
transmission to similar effect (as provided above) from an Eligible  Institution
is received by the  Exchange  Agent.  Issuances of New Notes in exchange for Old
Notes

                                      -25-
<PAGE>
tendered  pursuant to a Notice of  Guaranteed  Delivery  or letter,  telegram or
facsimile  transmission  to similar  effect (as  provided  above) by an Eligible
Institution  will be made only  against  submission  of a duly signed  Letter of
Transmittal  (and any other required  documents) and deposit of the tendered Old
Notes.

         All questions as to the validity,  form, eligibility (including time of
receipt)  and  acceptance  for  exchange  of any  tender  of Old  Notes  will be
determined by GST USA, whose  determination  will be final and binding.  GST USA
reserves the  absolute  right to reject any or all tenders not in proper form or
the  acceptance  for exchange of which may, in the opinion of GST USA's counsel,
be  unlawful.  GST USA also  reserves  the  absolute  right to waive  any of the
conditions of the Exchange Offer or any defect or  irregularity in the tender of
any Old Notes.  None of GST USA, the Exchange  Agent or any other person will be
under any duty to give  notification of any defects or irregularities in tenders
or will incur any liability for failure to give any such  notification.  Any Old
Notes  received by the  Exchange  Agent that are not validly  tendered and as to
which the  defects or  irregularities  have not been cured or waived,  or if Old
Notes are submitted in a principal amount at maturity greater than the principal
amount at maturity of Old Notes being tendered by such tendering Holder, will be
returned  by the  Exchange  Agent to the  tendering  holders,  unless  otherwise
provided in the Letter of  Transmittal,  as soon as  practicable  following  the
Expiration Date.

         In addition,  GST USA reserves the right in its sole  discretion to (a)
purchase or make offers for any Old Notes that remain outstanding  subsequent to
the Expiration Date and (b) to the extent permitted by applicable law,  purchase
Old Notes in the open market, in privately negotiated transactions or otherwise.
The terms of any such  purchases  or offers  will  differ  from the terms of the
Exchange Offer.

TERMS AND CONDITIONS OF THE LETTER OF TRANSMITTAL

         The Letter of Transmittal  contains,  among other things, the following
terms and conditions, which are part of the Exchange Offer.

         The  party   tendering  Old  Notes  for  exchange  (the   "Transferor")
exchanges,  assigns  and  transfers  the Old  Notes  to GST USA and  irrevocably
constitutes  and  appoints  the  Exchange  Agent as the  Transferor's  agent and
attorney-in-fact  to  cause  the  Old  Notes  to be  assigned,  transferred  and
exchanged.  The  Transferor  represents  and warrants that it has full power and
authority to tender, exchange,  assign and transfer the Old Notes and to acquire
New Notes issuable upon the exchange of such tendered Old Notes,  and that, when
the same are accepted for exchange,  GST USA will acquire good and  unencumbered
title to the  tendered  Old Notes,  free and clear of all  liens,  restrictions,
charges and  encumbrances  and not subject to any adverse claim.  The Transferor
also warrants that it will,  upon  request,  execute and deliver any  additional
documents  deemed  by GST USA to be  necessary  or  desirable  to  complete  the
exchange, assignment and transfer of tendered Old Notes or transfer ownership of
such Old Notes on the account books  maintained by DTC. All authority  conferred
by the  Transferor  will  survive the death,  bankruptcy  or  incapacity  of the
Transferor  and every  obligation  of the  Transferor  will be binding  upon the
heirs, legal representatives,  successors, assigns, executors and administrators
of such Transferor.

         By executing a Letter of Transmittal,  each Holder will make to GST USA
and GST the  representations  set forth above under the heading " -- Purpose and
Effect of the Exchange Offer."

WITHDRAWAL OF TENDERS

         Tenders of Old Notes  pursuant to the Exchange  Offer are  irrevocable,
except that Old Notes  tendered  pursuant to the Exchange Offer may be withdrawn
at any time prior to 5:00 p.m., New York City time, on the Expiration Date.

         To be  effective,  a written,  telegraphic  or  facsimile  transmission
notice  of  withdrawal  must be timely  received  by the  Exchange  Agent at the
address set forth in the Letter of Transmittal prior to 5:00 p.m., New York City
time on the  Expiration  Date.  Any such notice of  withdrawal  must specify the
holder  named in the Letter of  Transmittal  as having  tendered Old Notes to be
withdrawn, the certificate numbers and designation of Old Notes to be withdrawn,
the principal amount of Old Notes delivered for exchange,  a statement that such
Holder is  withdrawing  his election to have such Old Notes  exchanged,  and the
name of the registered Holder of such Old

                                      -26-

<PAGE>
Notes,  and must be signed  by the  Holder  in the same  manner as the  original
signature  on the  Letter  of  Transmittal  (including  any  required  signature
guarantees)  or be  accompanied  by  evidence  satisfactory  to GST USA that the
person  withdrawing the tender has succeeded to the beneficial  ownership of the
Old Notes being withdrawn. The Exchange Agent will return the properly withdrawn
Old Notes promptly following receipt of notice of withdrawal.  If Old Notes have
been tendered pursuant to the procedure for book-entry  transfer,  any notice of
withdrawal must specify the name and number of the account at DTC to be credited
with the  withdrawn  Old  Notes or  otherwise  comply  with DTC  procedure.  All
questions  as to the  validity  of  notices  of  withdrawal,  including  time of
receipt, will be determined by GST USA, and such determination will be final and
binding on all parties.

CONDITIONS TO THE EXCHANGE OFFER

         Notwithstanding  any other  provision  of the  Exchange  Offer,  or any
extension of the Exchange Offer, GST USA will not be required to issue New Notes
in exchange for any properly tendered Old Notes not theretofore accepted and may
terminate the Exchange Offer,  or, at its option,  modify or otherwise amend the
Exchange Offer, if either of the following events occur:

         (a) any statute,  rule or regulation  shall have been  enacted,  or any
         action  shall  have been taken by any court or  governmental  authority
         which,  in the sole judgment of GST USA,  would  prohibit,  restrict or
         otherwise render illegal consummation of the Exchange Offer, or

         (b) there  shall occur a change in the  current  interpretation  by the
         staff of the  Commission  which,  in GST  USA's  sole  judgment,  might
         materially impair GST USA's ability to proceed with the Exchange Offer.

         GST USA expressly  reserves the right to terminate  the Exchange  Offer
and not accept for exchange any Old Notes upon the  occurrence  of either of the
foregoing  conditions  (which  represent  all of the material  conditions to the
acceptance by GST USA of properly tendered Old Notes).

         The foregoing conditions are for the sole benefit of GST USA and may be
waived by GST USA, in whole or in part,  in its sole  discretion.  The foregoing
conditions  must be either  satisfied  or  waived  prior to  termination  of the
Exchange  Offer.  Any  determination  made  by  GST  USA  concerning  an  event,
development  or  circumstance  described  or referred to above will be final and
binding on all parties.

EXCHANGE AGENT

         United States Trust Company of New York has been  appointed as Exchange
Agent for the Exchange Offer.  Questions and requests for  assistance,  requests
for additional  copies of this  Prospectus or of the Letter of  Transmittal  and
requests for Notices of Guaranteed  Delivery  should be directed to the Exchange
Agent addressed as follows:

BY MAIL (REGISTERED OR CERTIFIED MAIL RECOMMENDED):

         United States Trust Company of New York
         P.O. Box 844
         Cooper Station
         New York, New York 10276-0844

BY OVERNIGHT COURIER:

         United States Trust Company of New York
         770 Broadway, 13th Floor
         Corporate Trust Operations Department
         New York, New York 10003


BY HAND DELIVERY:

         United States Trust Company of New York
         111 Broadway
         Lower Level
         New York, New York 10006
         Attn: Corporate Trust Services


                                      -27-

<PAGE>
BY FACSIMILE:     (212) 420-6152 Confirm by Telephone: (800) 548-6565

                  (For Eligible Institutions Only)

FEES AND EXPENSES

         The  expense  of  soliciting  tenders  will be borne  by GST  USA.  The
principal solicitation is being made by mail; however,  additional solicitations
may be made by  telegraph,  telephone  or in  person  by  officers  and  regular
employees of GST USA and its affiliates. No additional compensation will be paid
to any such officers and employees who engage in soliciting tenders.

         GST USA has not retained any  dealer-manager  or other soliciting agent
in connection with the Exchange Offer and will not make any payments to brokers,
dealers  or  others  soliciting  acceptances  of the  Exchange  Offer.  GST USA,
however,  will pay the Exchange  Agent  reasonable  and  customary  fees for its
services and will  reimburse  it for its  reasonable  out-of-pocket  expenses in
connection  therewith.   GST  USA  may  also  pay  brokerage  houses  and  other
custodians,  nominees and  fiduciaries  the  reasonable  out-of-pocket  expenses
incurred  by  them in  forwarding  copies  of this  Prospectus,  the  Letter  of
Transmittal and related  documents to the beneficial owners of the Old Notes and
in handling or forwarding tenders for exchange.

         The  expenses to be incurred in  connection  with the  Exchange  Offer,
including fees and expenses of the Exchange Agent and Trustee and accounting and
legal fees of GST USA, will be paid by GST USA.

         GST USA will pay all transfer taxes, if any, applicable to the exchange
of Old Notes pursuant to the Exchange  Offer.  If,  however,  New Notes,  or Old
Notes for  principal  amounts not tendered or accepted for  exchange,  are to be
delivered  to, or are to be issued in the name of,  any  person  other  than the
registered  Holder of the Old Notes tendered or if a transfer tax is imposed for
any reason other than the exchange of Old Notes pursuant to the Exchange  Offer,
then the amount of any such transfer  taxes  (whether  imposed on the registered
Holder or any  other  persons)  will be  payable  by the  tendering  Holder.  If
satisfactory  evidence of payment of such taxes or  exemption  therefrom  is not
submitted with the Letter of Transmittal, the amount of such transfer taxes will
be billed directly to such tendering Holder.

ACCOUNTING TREATMENT

         The New Notes will be  recorded at the same  carrying  value as the Old
Notes as reflected in GST USA's  accounting  records on the date of the exchange
because the exchange of the Old Notes for the New Notes is the completion of the
selling process contemplated in the issuance of the Old Notes.  Accordingly,  no
gain or loss for  accounting  purposes will be  recognized.  The expenses of the
Exchange Offer and the unamortized  expenses  related to the issuance of the Old
Notes will be amortized over the term of the New Notes.

OTHER

         Participation  in the Exchange  Offer is voluntary  and Holders  should
carefully  consider  whether  to  accept.  Holders of the Old Notes are urged to
consult  their  financial and tax advisors in making their own decisions on what
action to take.

         No person has been  authorized to give any  information  or to make any
representations in connection with the Exchange Offer other than those contained
in this Prospectus. If given or made, such information or representations should
not be relied  upon as having  been  authorized  by GST USA or GST.  Neither the
delivery of this  Prospectus  nor any exchange made hereunder  shall,  under any
circumstances, shall create any implication that there has been no change in the
affairs of GST USA or GST since the respective dates as of which  information is
given  herein.  The  Exchange  Offer is not being  made to (nor will  tenders be
accepted from or on behalf of) Holders of Old Notes in any jurisdiction in which
the  making of the  Exchange  Offer or the  acceptance  thereof  would not be in
compliance  with the laws of such  jurisdiction.  However,  GST USA may,  at its
discretion, take such action as it may deem necessary to make the Exchange Offer
in any such  jurisdiction  and extend the Exchange Offer to Holders of Old Notes
in such jurisdiction.

                                      -28-
<PAGE>
         As a result of the making of the Exchange  Offer,  GST USA and GST will
have  fulfilled  a covenant  contained  in the  Registration  Rights  Agreement.
Holders of the Old Notes who do not tender their Old Notes in the Exchange Offer
will  continue to hold such Old Notes and will be entitled to all the rights and
limitations  applicable  thereto under the Indenture  except for any such rights
under the  Registration  Rights Agreement and except that the Old Notes will not
be entitled to the contingent  increase in interest rate provided for in the Old
Notes.  All untendered Old Notes will continue to be subject to the restrictions
on transfer set forth in the Indenture and the Old Notes. To the extent that Old
Notes are tendered and accepted in the Exchange Offer,  the trading  market,  if
any, for untendered Old Notes could be adversely affected.

                                 USE OF PROCEEDS

         GST USA will not receive any cash proceeds from the issuance of the New
Notes offered hereby. In consideration for issuing the New Notes as contemplated
in this Prospectus, GST USA will receive in exchange Old Notes in like principal
amount,  the terms of which are  identical in all  material  respects to the New
Notes, except that the offer and sale of such New Notes will be registered under
the  Securities  Act  and,  therefore,  will not bear  legends  restricting  the
transfer  thereof.  Old Notes  surrendered  in  exchange  for New Notes  will be
retired and canceled and cannot be  reissued.  Accordingly,  issuance of the New
Notes will not result in a change in the indebtedness of the Company.

   
         GST and GST USA received gross proceeds of approximately $180.0 million
from the December Offering.  Of the net proceeds of the December Offering,  $2.0
million was applied to the  repayment  of  short-term  indebtedness  incurred on
November 20, 1995 at an interest  rate of 12% per annum.  GST and GST USA intend
to use approximately 75% of the net proceeds of the December Offering,  together
with  borrowings  under the Tomen Facility (to the extent  projects are approved
thereunder),  principally  to complete  the  expansion  and  enhancement  of its
existing  competitive  access  networks,   as  well  as  to  develop  additional
competitive access networks. In addition, approximately 10% of the proceeds will
be applied to expand the Company's long distance  business and approximately 10%
of the proceeds will be applied to implement its switched and enhanced  services
strategy,  including the acquisition and deployment of switches, and the general
development   and   growth   of  its   telecommunications   services   business.
Approximately  5% of the proceeds of the December  Offering also will be applied
to fund future operating deficits and for working capital purposes.  The Company
will need to raise  significant  capital from outside sources in addition to the
proceeds of the December  Offering.  See "Risk  Factors --  Significant  Capital
Requirements,"  "--Substantial  Indebtedness"  and  "--  Possible  Inability  to
Service  Debt," "--  Historical  and  Anticipated  Future  Operating  Losses and
Negative EBITDA."
    

                                MATERIAL CHANGES

         In  December  1995,  GST  sold  $20,000,187  of the  Convertible  Notes
pursuant to an indenture and GST USA sold $160,001,496 of the Old Notes pursuant
to the Indenture in the December  Offering.  The proceeds were used as described
in "Use of Proceeds."



                                      -29-
<PAGE>
                  DEFICIENCY IN EARNINGS TO COVER FIXED CHARGES

         For purposes of this  calculation,  "earnings"  are defined as earnings
before income taxes,  extraordinary  items and fixed  charges.  "Fixed  charges"
consist of interest  charges and  amortization  of debt  expense and discount or
premium  related to  indebtedness,  whether  expensed  or  capitalized  and that
portion of rental expense the Company believes to be representative of interest.
<TABLE>
<CAPTION>
                                                   Years Ended
                                                    August 31,
                            ---------------------------------------------------            13 Months Ended         Year Ended  
                                                                                            September 30,         September 30,
                                  1991                1992                 1993                  1994                 1995     
                                  ----                ----                 ----          -----------------      ---------------
<S>                                 <C>                   <C>                <C>                  <C>                <C>       
Deficiency in Earnings
   to Cover Fixed
   Charges                          24,000                52,000             800,000              3,000,000          13,800,000
</TABLE>




                                      -30-
<PAGE>
                          DESCRIPTION OF THE NEW NOTES

         The Old Notes were issued under the Indenture among GST USA, as issuer,
GST, as  guarantor,  and United States Trust Company of New York, as Trustee (in
such capacity, the "Trustee"). The New Notes will be issued under the Indenture,
which will be qualified  under the Trust  Indenture Act of 1939, as amended (the
"Trust Indenture Act"), upon the effectiveness of the Registration  Statement of
which  this  Prospectus  is a part.  The form and terms of the New Notes are the
same in all  material  respects  as the form and terms of the Old Notes,  except
that the  offer and sale of the New Notes  will have been  registered  under the
Securities Act and,  therefore,  the New Notes will not bear legends restricting
transfer thereof.  Upon the consummation of the Exchange Offer, Holders of Notes
will not be entitled to registration rights under, or the contingent increase in
interest rate provided pursuant to, the Registration  Rights Agreement.  The New
Notes  will  evidence  the same debt as the Old Notes and will be  treated  as a
single class under the Indenture with any Old Notes that remain outstanding.

         The terms of the Notes  include those stated in the Indenture and those
made part of the Indenture by reference to the Trust  Indenture Act as in effect
on the date of the  Indenture.  The  Notes  are  subject  to all such  terms and
reference is made to the Indenture  and the Trust  Indenture Act for a statement
thereof.  A copy of the  Indenture  has been  filed  with the  Commission  as an
exhibit  to the Form  20-F.  The  following  summary,  which  describes  certain
provisions of the  Indenture and the Notes,  does not purport to be complete and
is subject to, and is qualified in its entirety by reference  to, the  Indenture
and the Notes, including the definitions therein of terms not defined herein and
those terms made a part thereof by the Trust Indenture Act. Whenever  particular
defined terms of the Indenture  not  otherwise  defined  herein are referred to,
such defined terms are incorporated herein by reference.

GENERAL

         The Notes are unsecured, unsubordinated obligations of GST USA, limited
to $312.4 million  aggregate  principal  amount at maturity,  and will mature on
December  15,  2005.  From and  after  December  15,  2000,  each Note will bear
interest at the rate of 13 7/8% per annum, payable  semiannually  (to Holders of
record  at the  close  of  business  on the  June 1 or  December  1  immediately
preceding  the Interest  Payment  Date) on June 15 and December 15 of each year,
commencing June 15, 2001.

         Although for United States income tax purposes a significant  amount of
original issue  discount,  taxable as ordinary  income,  will be recognized by a
Holder of Notes as such  discount is amortized  from the date of issuance of the
Notes,  Holders of Notes will not receive  any  payments on the Notes until June
15, 2001. For a description  of certain tax matters  related to an investment in
the Notes, see "Certain United States Federal Income Tax Considerations."

         Principal  of,  premium,  if any,  and  interest  on the Notes  will be
payable, and the Notes may be exchanged or transferred,  at the office or agency
of GST USA,  as the case may be, in the  Borough of  Manhattan,  the City of New
York (which  initially will be the corporate  trust office of the Trustee at 114
West 47th Street,  New York, New York 10036-1532);  provided that, at the option
of GST USA,  payment of interest may be made by check  mailed to the  respective
addresses of the Holders as each such address appears in the Security Register.

         The Notes are issued only in fully registered form, without coupons, in
denominations of $1,000 of principal  amount at maturity and integral  multiples
thereof. See "-- Book-Entry;  Delivery and Form." No service charge will be made
for any  registration  of transfer or exchange of Notes,  but GST USA or GST, as
the case may be, may require  payment of a sum  sufficient to cover any transfer
tax or other similar governmental charge payable in connection therewith.


                                      -31-
<PAGE>
OPTIONAL REDEMPTION

         The Notes are redeemable at the option of GST USA, in whole or in part,
at any time or from time to time,  on or after  December  15,  2000 and prior to
maturity,  upon not less than 30 nor more than 60 days' prior  notice  mailed by
first-class  mail to each  Holder's  last  address as it appears in the Security
Register,  at the  following  Redemption  Prices  (expressed in  percentages  of
principal amount),  plus accrued and unpaid interest,  if any, to the Redemption
Date (subject to the right of Holders of record on the relevant  Regular  Record
Date that is on or prior to the  Redemption  Date to receive  interest due on an
Interest  Payment  Date),  if redeemed  during the  12-month  period  commencing
December 15, of the years set forth below:

Year                                              Redemption Price

2000..............................................    106.938%

2001..............................................    103.469%

2002 and thereafter...............................    100.000%


         In the case of any  partial  redemption,  selection  of the  Notes  for
redemption  will be made by the Trustee in compliance  with the  requirements of
the  principal  national  securities  exchange,  if any, on which such notes are
listed or, if such notes are not listed on a national securities exchange,  on a
pro rata  basis,  by lot or by such  other  method as such  Trustee  in its sole
discretion  shall  deem to be fair  and  appropriate;  provided  that no Note of
$1,000 in principal amount at maturity or less shall be redeemed in part. If any
Note is to be redeemed in part only,  the notice of redemption  relating to such
Note shall state the portion of the principal  amount at maturity  thereof to be
redeemed. A new Note in principal amount equal to the unredeemed portion thereof
will be  issued  in the name of the  Holder  thereof  upon  cancellation  of the
original Note.

         The Notes are also subject to redemption  as a whole,  but not in part,
at the option of GST USA at any time at 100% of their Accreted  Value,  together
with accrued interest thereon,  if any, to the Redemption Date, in the event GST
USA has become or would  become  obligated to pay, on the next date on which any
amount would be payable with respect to the Notes,  any Additional  Amounts as a
result  of  a  change  in  the  laws  (including  any  regulations   promulgated
thereunder) of Canada (or any political  subdivision or taxing authority thereof
or therein), or any change in any official position regarding the application or
interpretation of such laws or regulations, which change is announced or becomes
effective on or after the date of this Prospectus.

NOTES GUARANTEE

         GST USA's  obligations  under  the Notes are fully and  unconditionally
guaranteed on a senior basis by GST.  Notwithstanding  the foregoing,  the Notes
Guarantee will not be enforceable  against GST in an amount in excess of the net
worth  of GST at the  time  that  determination  of such  net  worth  is,  under
applicable law, relevant to the enforceability of the Notes Guarantee.  Such net
worth will include any claim of GST against GST USA, or GST USA against GST, for
reimbursement and any claim against any other guarantor for contribution.

RANKING

         The  Notes  and  the  Notes  Guarantee  are  unsecured,  unsubordinated
indebtedness  of GST USA and  GST,  respectively,  rank  PARI  PASSU in right of
payment with all unsecured,  unsubordinated indebtedness and are senior in right
of payment to all subordinated  indebtedness,  of GST USA and GST, respectively,
including  GST  USA's  guarantee  (the  "Convertible  Notes  Guarantee")  of the
Convertible Notes and the Convertible Notes, respectively. At February 15, 1996,
GST USA and GST had no outstanding  borrowings other than the Notes. GST USA and
GST are each  holding  companies.  The  Notes and the  Notes  Guarantee  will be
effectively  subordinated to the liabilities of the  subsidiaries of GST USA and
GST,  respectively,  including  trade  payables,  and at  such  date  GST  USA's
subsidiaries  had   approximately   $30.2  million  of  liabilities   (excluding
intercompany  payables),  including $20.5 million of indebtedness,  all of which
was secured.  The Company is expected to incur substantial amounts of additional
indebtedness   in  the  future.   See  "Risk  Factors  --  Significant   Capital
Requirements."


                                      -32-

<PAGE>
BOOK-ENTRY; DELIVERY AND FORM

         The  certificates  representing  the  Notes  will be  issued  in  fully
registered form without interest coupons. Notes sold in offshore transactions in
reliance on Regulation S under the Securities  Act are initially  represented by
one or more permanent global Notes in definitive,  fully registered form without
interest  coupons (each a "Regulation S Global Note") and are deposited with the
deposited  with the Trustee as custodian  for, and  registered in the name of, a
nominee  of DTC for the  accounts  of  Management  Trust  Company  of New  York,
Brussels office,  as operator of the Euroclear System  ("Euroclear")  and Cedel,
S.A. ("Cedel").

         Notes  sold in  reliance  on Rule 144A are  represented  by one or more
permanent  global Notes, in definitive,  fully  registered form without interest
coupons  (each a "Registered  Global  Note;" and together with the  Regulation S
Global Note, the "Global Notes") and are deposited with the Trustee as custodian
for, and registered in the name of, a nominee of DTC.

         Notes   originally   purchased  by  or  transferred  to   Institutional
Accredited Investors who are not qualified institutional buyers (the "Non-Global
Purchasers") are in registered form without coupons (the "Certificated  Notes").
Upon the  transfer  of  Certificated  Notes  initially  issued  to a  Non-Global
Purchaser to a qualified  institutional buyer, such Certified Notes will, unless
the relevant  Restricted  Global Note has previously been exchanged in whole for
Certificated Notes, be exchanged for an interest in such Restricted Global Note.

         Ownership  of  beneficial  interests  in a Global  Note is  limited  to
persons  who  have  accounts  with  DTC  ("participants")  or  persons  who hold
interests through participants. Ownership of beneficial interests in Global Note
are shown on, and the transfer of that  ownership will be effected only through,
records  maintained  by  DTC  or its  nominee  (with  respect  to  interests  of
participants)  and the records of  participants  (with  respect to  interests or
persons other than participants).  Qualified institutional buyers may hold their
interests  in a  Restricted  Global  Note  directly  through  DTC  if  they  are
participants  in such  system,  or  indirectly  through  organizations  that are
participants in such system.

         Investors  may hold  their  interests  in a  Regulation  S Global  Note
directly  through Cedel or Euroclear,  if they are participants in such systems,
or indirectly through  organizations that are participants in such system.  Upon
the  commencement of the Exchange Offer,  investors may also hold such interests
through organizations other than Cedel or Euroclear that are participants in the
DTC system.  Cedel and Euroclear  will hold interests in the Regulation S Global
Notes on behalf of their participants through DTC.

         So long as DTC, or its nominee,  is the registered owner or Holder of a
Global Note,  DTC or such nominee,  as the case may be, will be  considered  the
sole  owner or holder  of the  Notes  represented  by such  Global  Note for all
purposes under the Indenture and such Notes. No beneficial  owner of an interest
in a Global Note will be able to transfer  that  interest  except in  accordance
with DTC's  applicable  procedures,  in addition to those provided for under the
Indenture and, if applicable, those to Euroclear and Cedel.

         Payments of the  principal  of, and  interest on, a Global Note will be
made to DTC or its nominee, as the case may be, as the registered owner thereof.
Neither  GST  USA,   GST,  the  Trustee  or  any  Paying  Agent  will  have  any
responsibility  or  liability  for any  aspect  of the  records  relating  to or
payments made on account of beneficial  ownership  interests in a Global Note or
for  maintaining,   supervision  or  reviewing  any  records  relating  to  such
beneficial ownership interests.

         GST USA and GST expect  that DTC or its  nominee,  upon  receipt of any
payment of  principal  or  interest  in respect of a Global  Note,  will  credit
participants'   accounts  with  payments  in  amounts   proportionate  to  their
respective  beneficial  interests in the principal amount of such Global Note as
shown on the  records of DTC or its  nominee.  GST USA and GST also  expect that
payments by participants  to owners of beneficial  interests in such Global Note
held through such  participants  will be governed by standing  instructions  and
customary practices, as is now the case with securities held for the accounts of
customers registered in the names of nominees for such customers.  Such payments
will be the responsibility of such participants.


                                      -33-

<PAGE>
         Transfers between  participants in DTC will be effected in the ordinary
way in  accordance  with  DTC  rules  and will be  settled  in  next-day  funds.
Transfers  between  participants  in Euroclear and Cedel will be effected in the
ordinary way in accordance with their respective rules and operating procedures.

         GST USA and GST expect  that DTC will take any action  permitted  to be
taken by a Holder of Notes  (including the presentation of Notes for exchange as
described  below) only at the  direction  of one or more  participants  to whose
account the DTC  interests  in a Global Note is credited  and only in respect of
such  portion  of the  aggregate  principal  amount  of Notes  as to which  such
participant or participants has or have given such direction.  However, if there
is an Event of Default under the Notes, DTC will exchange the applicable  Global
Note for Certified Notes, which it will distribute to its participants.

         GST USA and GST understand  that DTC is a limited purpose trust company
organized  under  the laws of the State of New York,  a  "banking  organization"
within the  meaning of New York  Banking  Law, a member of the  Federal  Reserve
System, a "clearing  corporation"  within the meaning of the Uniform  Commercial
Code and a "Clearing  Agency"  registered  pursuant to the provisions of Section
17A of the Exchange Act. DTC was created to hold securities for its participants
and facilitate the clearance and settlement of securities  transactions  between
participants   through   electronic   book-entry  changes  in  accounts  of  its
participants, thereby eliminating the need for physical movement of certificates
and certain other organizations.  Indirect access to the DTC system is available
to others such as banks, brokers, dealers and trust companies that clear through
or maintain a custodial  relationship  with a  participant,  either  directly or
indirectly ("indirect participants").

         Although DTC,  Euroclear and Cedel are expected to follow the foregoing
procedures in order to facilitate  transfers of interests in a Global Note among
participants  of DTC,  Euroclear  and  Cedel,  they are under no  obligation  to
perform or continue  to perform  such  procedures,  and such  procedures  may be
discontinued  at any time.  Neither GST USA,  GST nor the Trustee  will have any
responsibility  for  the  performance  by  DTC.  Euroclear  or  Cedel  or  their
respective participants or indirect participants or their respective obligations
under the rules and procedures governing their operations.

CERTIFICATED NOTES

         If DTC is at any time  unwilling  or unable to continue as a depositary
for the Global Notes and a successor  depositary  is not appointed by GST USA or
GST,  as the case may be,  within 90 days,  GST USA or GST,  as the case may be,
will issue Certificated Notes in exchange for the Global Notes.

AUTHENTICATION

         The Notes must be executed by two  officers of GST USA by  facsimile or
manual  signature  in the name and on behalf  of GST USA.  If an  officer  whose
signature  is on a Note no longer  holds that  office at the time the Trustee or
authenticating   agent   authenticates   the  Note,   the  Note  will  be  valid
nevertheless.  A security will not be valid until the Trustee or  authenticating
agent  manually  signs  the  certificate  of  authentication  of the  Note.  The
signature will be conclusive evidence that the Note has been authenticated under
the Indenture.

CERTAIN DEFINITIONS

         Set forth  below is a summary of certain of the  defined  terms used in
the covenants and other  provisions of the  Indenture.  Reference is made to the
Indenture for the full definition of all terms as well as any other  capitalized
term used herein for which no definition is provided.

         "Accreted Value" is defined to mean, for any Specified Date, the amount
provided for each $1,000 principal amount at maturity of Notes:

               (i) if the Specified  Date occurs on one of the  following  dates
          (each a "Semi-Annual Accrual Date"), the Accreted Value will equal the
          amount set forth below for such Semi-Annual Accrual Date:

                                      -34-
<PAGE>
          SEMI-ANNUAL ACCRUAL DATE                              ACCRETED VALUE
          ------------------------                              --------------

June 15, 1996..........................................          $  546.80
December 15, 1996.....................................              584.73
June 15, 1997..........................................             625.30
December 15, 1997......................................             668.68
June 15, 1998.........................................              715.07
December 15, 1998......................................             764.68
June 15, 1999..........................................             817.72
December 15, 1999.....................................              874.45
June 15, 2000..........................................             935.12
December 15, 2000......................................          $1,000.00

               (iii)  if the  Specified  Date  occurs  between  two  Semi-Annual
          Accrual  Dates,  the  Accreted  Value  will  equal  the sum of (a) the
          Accreted Value for the Semi-Annual Accrual Date immediately  preceding
          such  Specified Date and (b) an amount equal to the product of (1) the
          Accreted Value for the immediately  following Semi-Annual Accrual Date
          less the  Accreted  Value for the  immediately  preceding  Semi-Annual
          Accrual Date  multiplied by (2) a fraction,  the numerator of which is
          the number of days from the immediately  preceding Semi-Annual Accrual
          Date to the  Specified  Date,  using a 360-day  year of twelve  30-day
          months, and the denominator of which is 180; or

               (iv) if the  Specified  Date  occurs  after the last  Semi-Annual
          Accrual Date, the Accreted Value will equal $1,000.

         "Adjusted Consolidated Net Income" means, for any period, the aggregate
net  income (or loss) of GST and its  Restricted  Subsidiaries  for such  period
determined in conformity  with GAAP;  provided that the following items shall be
excluded in computing  Adjusted  Consolidated Net Income (without  duplication):
(i) the net  income of any  Person  (other  than net  income  attributable  to a
Restricted  Subsidiary)  in  which  any  Person  (other  than  GST or any of its
Restricted  Subsidiaries) has an interest and the net income of any Unrestricted
Subsidiary,   except  to  the  extent  of  the  amount  of  dividends  or  other
distributions actually paid to GST or any of its Restricted Subsidiaries by such
other Person, or such Unrestricted  Subsidiary,  during such period; (ii) solely
for the purposes of  calculating  the amount of Restricted  Payments that may be
made  pursuant  to  clause  (C) of the first  paragraph  of the  "Limitation  on
Restricted  Payments"  covenant described below (and in such case, except to the
extent includable pursuant to clause (i) above), the net income (or loss) of any
Person accrued prior to the date it becomes a Restricted Subsidiary or is merged
into or  consolidated  with GST or any of its Restricted  Subsidiaries or all or
substantially  all of the property and assets of such Person are acquired by GST
or any of its  Restricted  Subsidiaries;  (iii) the net income of any Restricted
Subsidiary to the extent that the declaration or payment of dividends or similar
distributions  by such  Restricted  Subsidiary  of such net income is not at the
time  permitted by the  operation of the terms of its charter or any  agreement,
instrument,  judgment,  decree, order, statute, rule or governmental  regulation
applicable  to such  Restricted  Subsidiary;  (iv) any  gains or  losses  (on an
after-tax  basis)  attributable  to Asset  Sales;  (v)  except for  purposes  of
calculating  the amount of  Restricted  Payments  that may be made  pursuant  to
clause (C) of the first  paragraph of the  "Limitation  on Restricted  Payments"
covenant  described  below, any amount paid or accrued as dividends on Preferred
Stock of GST or any  Restricted  Subsidiary  owned by Persons other than GST and
any of its  Restricted  Subsidiaries;  and  (vi)  all  extraordinary  gains  and
extraordinary losses.

         "Adjusted  Consolidated  Net Tangible Assets" means the total amount of
assets of GST and its Restricted  Subsidiaries  (less  applicable  depreciation,
amortization and other valuation reserves),  except to the extent resulting from
write-ups of capital assets  (excluding  write-ups in connection with accounting
for  acquisitions  in conformity with GAAP),  after deducting  therefrom (i) all
current   liabilities  of  GST  and  its  Restricted   Subsidiaries   (excluding
intercompany  items) and (ii) all goodwill,  trade names,  trademarks,  patents,
unamortized  debt  discount and expense and other like  intangibles,  all as set
forth on the  quarterly  or  annual  consolidated  balance  sheet of GST and its
Restricted  Subsidiaries,  prepared in  conformity  with GAAP and most  recently
filed with the  Commission  pursuant to the  "Commission  Reports and Reports to
Holders" covenant described below.


                                      -35-
<PAGE>
         "Affiliate"  means, as applied to any Person, any other Person directly
or indirectly  controlling,  controlled  by, or under direct or indirect  common
control  with,  such  Person.   For  purposes  of  this  definition,   "control"
(including,  with correlative meanings, the terms "controlling," "controlled by"
and  "under  common  control  with"),  as  applied  to  any  Person,  means  the
possession,  directly  or  indirectly,  of the  power to  direct  or  cause  the
direction of the  management  and policies of such Person,  whether  through the
ownership of voting securities, by contract or otherwise.

         "AMEX" means the American Stock Exchange (or any successor thereto) or,
if the  Common  Shares are not listed or  admitted  to trading on the AMEX,  the
principal national securities exchange on which the Common Shares are listed or,
if the Common Shares are not so listed, the Nasdaq National Market.

         "Asset  Acquisition"  means  (i)  an  investment  by  GST or any of its
Restricted  Subsidiaries in any other Person pursuant to which such Person shall
become a Restricted  Subsidiary  of GST or shall be merged into or  consolidated
with GST or any of its  Restricted  Subsidiaries;  provided  that such  Person's
primary business is related, ancillary or complementary to the businesses of GST
and its  Restricted  Subsidiaries  on the  date of  such  investment  or (ii) an
acquisition  by GST or any of its  Restricted  Subsidiaries  of the property and
assets of any Person other than GST or any of its Restricted  Subsidiaries  that
constitute  substantially  all of a division or line of business of such Person;
provided  that the  property  and assets  acquired  are  related,  ancillary  or
complementary  to the businesses of GST and its Restricted  Subsidiaries  on the
date of such acquisition.

         "Asset Sale" means any sale,  transfer or other disposition  (including
by  way  of  merger,   consolidation  or  sale-leaseback  transactions)  in  one
transaction or a series of related  transactions by GST or any of its Restricted
Subsidiaries to any Person other than GST or any of its Restricted  Subsidiaries
of (i) all or any of the Capital Stock of any Restricted Subsidiary, (ii) all or
substantially all of the property and assets of an operating unit or business of
GST or any of its Restricted  Subsidiaries or (iii) any other property or assets
of GST or any of its  Restricted  Subsidiaries  outside the  ordinary  course of
business of GST or such  Restricted  Subsidiary  and, in each case,  that is not
governed  by  the   provisions   of  the   Indenture   applicable   to  mergers,
consolidations and sales of assets of GST or GST USA; PROVIDED that "Asset Sale"
shall not include (x) sales or other dispositions of inventory,  receivables and
other current  assets or (y) sales or other  dispositions  of assets with a fair
market  value  (as  certified  in an  Officers'  Certificate)  not in  excess of
$200,000.

         "Average Life" means, at any date of determination  with respect to any
debt security,  the quotient obtained by dividing (i) the sum of the products of
(a) the  number of years  from such date of  determination  to the dates of each
successive  scheduled principal payment of such debt security and (b) the amount
of such principal payment by (ii) the sum of all such principal payments.

         "Capital Stock" means, with respect to any Person,  any and all shares,
interests,  participations or other  equivalents  (however  designated,  whether
voting or  non-voting)  in equity of such  Person,  whether now  outstanding  or
issued  after the date of the  Indenture,  including,  without  limitation,  all
Common Stock and Preferred Stock.

         "Capitalized  Lease" means, as applied to any Person,  any lease of any
property (whether real, personal or mixed) of which the discounted present value
of the rental  obligations of such Person as lessee, in conformity with GAAP, is
required to be capitalized on the balance sheet of such Person; and "Capitalized
Lease  Obligations" means the discounted present value of the rental obligations
under such lease.

         "Change  of  Control"  means  such time as (i) a  "person"  or  "group"
(within the meaning of Sections  13(d) and 14(d)(2) of the Exchange Act) becomes
the  ultimate  "beneficial  owner" (as defined in Rule 13d-3 under the  Exchange
Act) of Voting Stock representing more than 30% of the total voting power of the
Voting  Stock  of GST on a fully  diluted  basis;  (ii)  individuals  who on the
Closing Date constitute the Board of Directors  (together with any new directors
whose  election by the Board of  Directors or whose  nomination  for election by
GST's  shareholders was approved by a vote of at least two-thirds of the members
of the Board of Directors then in office who either were members of the Board of
Directors on the Closing Date or whose  election or nomination  for election was
previously  so  approved)  cease for any reason to  constitute a majority of the
members of the Board of  Directors  then in  office;  or (iii) all of the Common
Stock of GST USA is not beneficially owned by GST.

                                      -36-
<PAGE>
         "Closing Date" means December 19, 1995.

         "Consolidated EBITDA" means, for any period, the sum of the amounts for
such period of (i) Adjusted  Consolidated Net Income, (ii) Consolidated Interest
Expense,  to the  extent  such  amount  was  deducted  in  calculating  Adjusted
Consolidated  Net  Income,  (iii)  income  taxes,  to the extent such amount was
deducted in  calculating  Adjusted  Consolidated  Net Income  (other than income
taxes (either  positive or negative)  attributable to either  extraordinary  and
non-recurring gains or losses or sales of assets), (iv) depreciation expense, to
the extent such amount was deducted in  calculating  Adjusted  Consolidated  Net
Income,  (v)  amortization  expense,  to the extent such amount was  deducted in
calculating Adjusted  Consolidated Net Income, and (vi) all other non-cash items
reducing  Adjusted  Consolidated  Net Income (other than items that will require
cash  payments and for which an accrual or reserve is, or is required by GAAP to
be, made), less all non-cash items increasing Adjusted  Consolidated Net Income,
all  as  determined  on  a  consolidated   basis  for  GST  and  its  Restricted
Subsidiaries  in  conformity  with  GAAP;   provided  that,  if  any  Restricted
Subsidiary  is not a Wholly Owned  Restricted  Subsidiary,  Consolidated  EBITDA
shall be reduced (to the extent not otherwise  reduced in accordance  with GAAP)
by an amount  equal to (A) the amount of the  Adjusted  Consolidated  Net Income
attributable to such Restricted Subsidiary multiplied by (B) the quotient of (1)
the number of shares of outstanding  Common Stock of such Restricted  Subsidiary
not  owned  on the  last  day of  such  period  by GST or any of its  Restricted
Subsidiaries  divided by (2) the total  number of shares of  outstanding  Common
Stock of such Restricted Subsidiary on the last day of such period.

         "Consolidated  Interest  Expense" means, for any period,  the aggregate
amount of  interest  in  respect  of  Indebtedness  (including  amortization  of
original  issue  discount on any  Indebtedness  and the interest  portion of any
deferred  payment  obligation,  calculated  in  accordance  with  the  effective
interest  method of accounting;  all  commissions,  discounts and other fees and
charges  owed  with  respect  to  letters  of  credit  and  bankers'  acceptance
financing;  the  net  costs  associated  with  Interest  Rate  Agreements;   and
Indebtedness  that is  Guaranteed  or  secured  by GST or any of its  Restricted
Subsidiaries)  and all but the  principal  component  of  rentals  in respect of
Capitalized  Lease  Obligations  paid,  accrued or scheduled to be paid or to be
accrued by GST and its Restricted  Subsidiaries  during such period;  EXCLUDING,
HOWEVER, (i) any amount of such interest of any Restricted Subsidiary if the net
income of such Restricted  Subsidiary is excluded in the calculation of Adjusted
Consolidated Net Income pursuant to clause (iii) of the definition  thereof (but
only in the same proportion as the net income of such  Restricted  Subsidiary is
excluded from the  calculation of Adjusted  Consolidated  Net Income pursuant to
clause (iii) of the definition thereof) and (ii) any premiums, fees and expenses
(and any  amortization  thereof)  payable in connection with the offering of the
Notes,  all as determined on a consolidated  basis (without  taking into account
Unrestricted Subsidiaries) in conformity with GAAP.

         "Consolidated   Net  Worth"  means,  at  any  date  of   determination,
shareholders'  equity as set forth on the most recently  available  quarterly or
annual consolidated balance sheet of GST and its Restricted  Subsidiaries (which
shall  be as of a date  not  more  than  90  days  prior  to the  date  of  such
computation,  and which shall not take into account Unrestricted  Subsidiaries),
less  any  amounts  attributable  to  Redeemable  Stock or any  equity  security
convertible  into or exchangeable for  Indebtedness,  the cost of treasury stock
and the principal  amount of any promissory  notes  receivable  from the sale of
Capital  Stock of GST or any of its  Restricted  Subsidiaries,  each  item to be
determined in conformity  with GAAP  (excluding the effects of foreign  currency
exchange  adjustments  under Financial  Accounting  Standards Board Statement of
Financial Accounting Standards No. 52).

         "Default"  means any event that is, or after  notice or passage of time
or both would be, an Event of Default.

         "Development  Company"  means a  Restricted  Subsidiary  whose  primary
business is the  development,  ownership  and  operation of  alternative  access
telecommunications networks.

         "fair  market  value"  means  the  price  that  would  be  paid  in  an
arm's-length  transaction  between  an  informed  and  willing  seller  under no
compulsion to sell and an informed and willing buyer under no compulsion to buy,
as   determined  in  good  faith  by  the  Board  of  Directors  of  GST  (whose
determination shall be conclusive) and evidenced by a Board Resolution.

         "GAAP" means  generally  accepted  accounting  principles in the United
States of  America  as in  effect as of the  Closing  Date,  including,  without
limitation, those set forth in the opinions and pronouncements of the

                                      -37-

<PAGE>
Accounting  Principles  Board of the  American  Institute  of  Certified  Public
Accountants  and  statements  and  pronouncements  of the  Financial  Accounting
Standards Board or in such other  statements by such other entity as approved by
a significant segment of the accounting profession.  All ratios and computations
contained in the Indentures shall be computed in conformity with GAAP applied on
a consistent  basis,  except that  calculations made for purposes of determining
compliance  with the terms of the  covenants  and with other  provisions  of the
Indentures  shall be made without giving effect to (i) the  amortization  of any
expenses  incurred in connection  with the offering of the Notes and (ii) except
as otherwise provided,  the amortization of any amounts required or permitted by
Accounting Principles Board Opinion Nos. 16 and 17.

         "Guarantee"  means any  obligation,  contingent  or  otherwise,  of any
Person directly or indirectly  guaranteeing any Indebtedness or other obligation
of any other Person and, without  limiting the generality of the foregoing,  any
obligation,  direct or indirect,  contingent or otherwise, of such Person (i) to
purchase or pay (or advance or supply funds for the purchase or payment of) such
Indebtedness or other obligation of such other Person (whether arising by virtue
of partnership arrangements,  or by agreements to keep-well, to purchase assets,
goods,  securities  or  services,  to  take-or-pay,  or  to  maintain  financial
statement conditions or otherwise) or (ii) entered into for purposes of assuring
in any other manner the obligee of such  Indebtedness or other obligation of the
payment  thereof or to protect such obligee  against loss in respect thereof (in
whole or in  part);  PROVIDED  that  the  term  "Guarantee"  shall  not  include
endorsements  for collection or deposit in the ordinary course of business.  The
term "Guarantee" used as a verb has a corresponding meaning.

         "Incur"  means,  with respect to any  Indebtedness,  to incur,  create,
issue,  assume,  Guarantee or otherwise become liable for or with respect to, or
become  responsible  for,  the  payment  of,  contingently  or  otherwise,  such
Indebtedness,  including  an  "incurrence"  of  Indebtedness  by  reason  of the
acquisition  of more than 50% of the Common Stock of any Person;  PROVIDED  that
neither the accrual of interest  nor the  accretion of original  issue  discount
shall be considered an Incurrence of Indebtedness.

         "Indebtedness"  means,  with  respect  to any  Person  at any  date  of
determination  (without  duplication),  (i) all  indebtedness of such Person for
borrowed  money,  (ii)  all  obligations  of such  Person  evidenced  by  bonds,
debentures,  notes or other similar  instruments,  (iii) all obligations of such
Person in respect of letters of credit or other similar  instruments  (including
reimbursement  obligations with respect  thereto),  (iv) all obligations of such
Person to pay the  deferred and unpaid  purchase  price of property or services,
which  purchase price is due more than six months after the date of placing such
property in service or taking  delivery and title  thereto or the  completion of
such  services,  except Trade  Payables,  (v) all  obligations of such Person as
lessee under Capitalized  Leases, (vi) all Indebtedness of other Persons secured
by a Lien on any  asset of such  Person,  whether  or not such  Indebtedness  is
assumed by such Person;  PROVIDED that the amount of such Indebtedness  shall be
the  lesser  of (A) the  fair  market  value  of  such  asset  at  such  date of
determination and (B) the amount of such Indebtedness, (vii) all Indebtedness of
other  Persons  Guaranteed  by such  Person to the extent such  Indebtedness  is
Guaranteed  by such  Person and (viii) to the extent not  otherwise  included in
this  definition,  obligations  under  Currency  Agreements  and  Interest  Rate
Agreements.  The amount of  Indebtedness  of any Person at any date shall be the
outstanding  balance at such date of all unconditional  obligations as described
above and, with respect to contingent  obligations,  the maximum  liability upon
the occurrence of the contingency  giving rise to the  obligation,  PROVIDED (A)
that the amount outstanding at any time of any Indebtedness issued with original
issue discount is the face amount of such Indebtedness and (B) that Indebtedness
shall not include any liability for federal, state, local or other taxes.

         "Indebtedness to EBITDA Ratio" means, as at any date of  determination,
the ratio of (i) the aggregate  amount of Indebtedness of GST and its Restricted
Subsidiaries  on a  consolidated  basis  as at the  date of  determination  (the
"Transaction  Date")  to (ii) the  Consolidated  EBITDA of GST for the then most
recent four full fiscal  quarters for which reports have been filed  pursuant to
the "Commission  Reports and Reports to Holders" covenant  described below (such
four full fiscal  quarter  period being  referred to herein as the "Four Quarter
Period");  PROVIDED that (x) pro forma effect shall be given to any Indebtedness
Incurred from the beginning of the Four Quarter Period  through the  Transaction
Date  (including any  Indebtedness  Incurred on the  Transaction  Date),  to the
extent  outstanding on the Transaction Date, (y) if during the period commencing
on the first day of such Four Quarter Period through the  Transaction  Date (the
"Reference  Period"),  GST  or any of its  Restricted  Subsidiaries  shall  have
engaged in any Asset Sale,  Consolidated EBITDA for such period shall be reduced
by an amount equal to the EBITDA (if positive),  or increased by an amount equal
to the EBITDA (if negative),  directly  attributable to the assets which are the
subject

                                      -38-

<PAGE>
of such Asset Sale as if such Asset Sale had  occurred  on the first day of such
Reference  Period  or (z) if  during  such  Reference  Period  GST or any of the
Restricted  Subsidiaries  shall  have made any Asset  Acquisition,  Consolidated
EBITDA  of GST  shall  be  calculated  on a pro  forma  basis  as if such  Asset
Acquisition and any Incurrence of Indebtedness to finance such Asset Acquisition
had taken place on the first day of such Reference Period.

         "Investment" in any Person means any direct or indirect  advance,  loan
or other extension of credit (including, without limitation, by way of Guarantee
or similar  arrangement;  but  excluding  advances to  customers in the ordinary
course of  business  that are,  in  conformity  with GAAP,  recorded as accounts
receivable  on the  balance  sheet  of GST or its  Restricted  Subsidiaries)  or
capital  contribution  to (by means of any transfer of cash or other property to
others or any  payment  for  property  or  services  for the  account  or use of
others),  or any  purchase  or  acquisition  of  Capital  Stock,  bonds,  notes,
debentures or other similar instruments issued by, such Person and shall include
(i) the designation of a Restricted Subsidiary as an Unrestricted Subsidiary and
(ii) the fair market value of the Capital Stock (or any other  Investment)  held
by GST and its  Restricted  Subsidiaries  of any Person  that has ceased to be a
Restricted  Subsidiary by reason of any transaction permitted by clause (iii) of
the  "Limitation  on the  Issuance  and  Sale of  Capital  Stock  of  Restricted
Subsidiaries"   covenant.  For  purposes  of  the  definition  of  "Unrestricted
Subsidiary"  and the  "Limitation  on Restricted  Payments"  covenant  described
below, (i)  "Investment"  shall include the fair market value of the assets (net
of  liabilities  (other  than  liabilities  to GST  or  any  of  its  Restricted
Subsidiaries))  of any  Restricted  Subsidiary  of GST at  the  time  that  such
Restricted Subsidiary of GST is designated an Unrestricted  Subsidiary and shall
exclude  the  fair  market  value  of the  assets  (net of  liabilities)  of any
Unrestricted  Subsidiary  at the  time  that  such  Unrestricted  Subsidiary  is
designated a Restricted  Subsidiary of GST and (ii) any property  transferred to
or from an Unrestricted  Subsidiary  shall be valued at its fair market value at
the time of such transfer,  in each case as determined by the Board of Directors
in good faith.

         "Lien" means any mortgage, pledge, security interest, encumbrance, lien
or charge of any kind (including,  without  limitation,  any conditional sale or
other title retention  agreement or lease in the nature  thereof,  any sale with
recourse against the seller or any Affiliate of the seller,  or any agreement to
give any security interest).

         "Net Cash  Proceeds"  means,  (a) with  respect to any Asset Sale,  the
proceeds of such Asset Sale in the form of cash or cash  equivalents,  including
payments in respect of deferred payment obligations (to the extent corresponding
to the principal, but not interest, component thereof) when received in the form
of cash or cash equivalents  (except to the extent such obligations are financed
or sold with recourse to GST or any Restricted Subsidiary) and proceeds from the
conversion  of  other   property   received  when  converted  to  cash  or  cash
equivalents,  net of (i)  brokerage  commissions  and  other  fees and  expenses
(including fees and expenses of counsel and investment  bankers) related to such
Asset  Sale,  (ii)  provisions  for all taxes  (whether  or not such  taxes will
actually be paid or are payable) as a result of such Asset Sale  without  regard
to  the   consolidated   results  of  operations  of  GST  and  its   Restricted
Subsidiaries, taken as a whole, (iii) payments made to repay Indebtedness or any
other  obligation  outstanding at the time of such Asset Sale that either (A) is
secured by a Lien on the  property  or assets sold or (B) is required to be paid
as a result of such sale and (iv)  appropriate  amounts to be provided by GST or
any Restricted  Subsidiary as a reserve against any liabilities  associated with
such   Asset   Sale,   including,   without   limitation,   pension   and  other
post-employment  benefit  liabilities,   liabilities  related  to  environmental
matters and liabilities under any  indemnification  obligations  associated with
such Asset Sale, all as determined in conformity  with GAAP and (b) with respect
to any issuance or sale of Capital Stock,  the proceeds of such issuance or sale
in the  form of cash or cash  equivalents,  including  payments  in  respect  of
deferred payment obligations (to the extent corresponding to the principal,  but
not  interest,  component  thereof)  when  received  in the form of cash or cash
equivalents  (except to the extent such  obligations  are  financed or sold with
recourse to GST or any Restricted  Subsidiary)  and proceeds from the conversion
of other property  received when converted to cash or cash  equivalents,  net of
attorneys' fees,  accountants'  fees,  underwriters' or placement  agents' fees,
discounts or commissions  and  brokerage,  consultant and other fees incurred in
connection  with such  issuance  or sale and net of taxes  paid or  payable as a
result thereof.

         "Offer to  Purchase"  means an offer to purchase  Notes by GST USA from
the  Holders  commenced  by  mailing a notice  to the  Trustee  and each  Holder
stating: (i) the covenant pursuant to which the offer is being made and that all
Notes validly  tendered  will be accepted for payment on a pro rata basis;  (ii)
the  purchase  price and the date of purchase  (which shall be a Business Day no
earlier than 30 days nor later than 60 days from the date such notice is mailed)
(the "Payment  Date");  (iii) that any Note not tendered will continue to accrue
interest pursuant to

                                      -39-
<PAGE>
its terms;  (iv) that,  unless GST USA  defaults in the payment of the  purchase
price,  any Note  accepted for payment  pursuant to the Offer to Purchase  shall
cease to accrue  interest  on and  after  the  Payment  Date;  (v) that  Holders
electing to have a Note  purchased  pursuant  to the Offer to  Purchase  will be
required to surrender the Note  together  with the form entitled  "Option of the
Holder to Elect Purchase" on the reverse side thereof  completed,  to the Paying
Agent at the address  specified  in the notice prior to the close of business on
the Business Day immediately  preceding the Payment Date; (vi) that Holders will
be entitled to withdraw their election if the Paying Agent  receives,  not later
than the close of business on the third Business Day  immediately  preceding the
Payment Date, a telegram,  facsimile  transmission  or letter  setting forth the
name of such Holder,  the principal amount of Notes delivered for purchase and a
statement  that such  Holder is  withdrawing  his  election  to have such  Notes
purchased;  and (vii) that Holders whose Notes are being  purchased only in part
will be issued new Notes equal in principal  amount to the  unpurchased  portion
thereof;  PROVIDED that each Note purchased and each new Note issued shall be in
a principal amount at maturity of $1,000 or integral multiples  thereof.  On the
Payment Date,  GST USA shall (i) accept for payment on a pro rata basis Notes or
portions  thereof tendered  pursuant to an Offer to Purchase;  (ii) deposit with
the Paying  Agent money  sufficient  to pay the  purchase  price of all Notes or
portions thereof so accepted;  and (iii) deliver,  or cause to be delivered,  to
the Trustee all Notes or portions thereof so accepted together with an Officers'
Certificate specifying the Notes or portions thereof accepted for payment by GST
USA.  The Paying Agent shall  promptly  mail to the Holders of Notes so accepted
payment in an amount equal to the purchase price, and the Trustee shall promptly
authenticate  and mail to such Holders a new Note equal in  principal  amount to
any  unpurchased  portion  of the Note  surrendered;  PROVIDED  that  each  Note
purchased and each new Note issued shall be in a principal amount at maturity of
$1,000 or integral multiples thereof. GST USA will publicly announce the results
of an Offer to  Purchase as soon as  practicable  after the  Payment  Date.  The
Trustee  shall act as the Paying  Agent for an Offer to  Purchase.  GST USA will
comply with Rule 14e-1 under the Exchange Act and any other  securities laws and
regulations  thereunder to the extent such laws and  regulations are applicable,
in the event that GST USA is required to repurchase  Notes  pursuant to an Offer
to Purchase.

         "Permitted   Investment"  means  (i)  an  Investment  in  a  Restricted
Subsidiary or a Person which will, upon the making of such Investment,  become a
Restricted  Subsidiary or be merged or consolidated  with or into or transfer or
convey all or substantially  all its assets to, GST or a Restricted  Subsidiary;
PROVIDED  that  such  person's  primary   business  is  related,   ancillary  or
complementary  to the businesses of GST and its Restricted  Subsidiaries  on the
date of such Investment; (ii) a Temporary Cash Investment; (iii) payroll, travel
and similar  advances  to cover  matters  that are  expected at the time of such
advances  ultimately  to be treated as expenses in  accordance  with GAAP;  (iv)
loans or advances to employees  made in the ordinary  course of business that do
not exceed $1 million in the aggregate at any time  outstanding;  and (v) stock,
obligations or securities received in satisfaction of judgments.

         "Permitted  Joint Venture Partner" means AT&T, MCI,  WorldCom,  Inc. or
Sprint or any of their Affiliates or successors.

         "Permitted Liens" means (i) Liens for taxes, assessments,  governmental
charges or claims that are being  contested in good faith by  appropriate  legal
proceedings promptly instituted and diligently conducted and for which a reserve
or other appropriate provision,  if any, as shall be required in conformity with
GAAP shall have been made;  (ii)  statutory  Liens of  landlords  and  carriers,
warehousemen,  mechanics,  suppliers,  materialmen,  repairmen or other  similar
Liens arising in the ordinary course of business and with respect to amounts not
yet delinquent or being contested in good faith by appropriate legal proceedings
promptly  instituted and  diligently  conducted and for which a reserve or other
appropriate  provision,  if any, as shall be required  in  conformity  with GAAP
shall have been made;  (iii) Liens  incurred or  deposits  made in the  ordinary
course of  business  in  connection  with  workers'  compensation,  unemployment
insurance and other types of social  security;  (iv) Liens  incurred or deposits
made to secure the performance of tenders, bids, leases, statutory or regulatory
obligations,   bankers'  acceptances,   surety  and  appeal  bonds,   government
contracts,  performance  and  return-of-money  bonds and other  obligations of a
similar  nature  incurred  in the  ordinary  course of  business  (exclusive  of
obligations for the payment of borrowed  money);  (v) easements,  rights-of-way,
municipal and zoning ordinances and similar charges, encumbrances, title defects
or other  irregularities  that do not  materially  interfere  with the  ordinary
course of  business  of GST or any of its  Restricted  Subsidiaries;  (vi) Liens
(including  extensions  and  renewals  thereof)  upon real or personal  property
acquired  after the Closing Date;  PROVIDED that (a) such Lien is created solely
for the  purpose of  securing  Indebtedness  Incurred,  in  accordance  with the
"Limitation on Indebtedness"  covenant  described below, (1) to finance the cost
(including the cost of improvement or  construction)  of the item of property or
assets subject thereto and

                                      -40-
<PAGE>
such Lien is created  prior to, at the time of or within  six  months  after the
later of the acquisition,  the completion of construction or the commencement of
full operation of such property or (2) to refinance any Indebtedness  previously
so secured,  (b) the principal amount of the  Indebtedness  secured by such Lien
does not  exceed  100% of such cost and (c) any such Lien shall not extend to or
cover any  property or assets other than such item of property or assets and any
improvements on such item;  (vii) leases or subleases  granted to others that do
not  materially  interfere  with the ordinary  course of business of GST and its
Restricted Subsidiaries,  taken as a whole; (viii) Liens encumbering property or
assets  under  construction  arising  from  progress  or partial  payments  by a
customer of GST or its  Restricted  Subsidiaries  relating  to such  property or
assets;  (ix) any interest or title of a lessor in the  property  subject to any
Capitalized  Lease or operating  lease;  (x) Liens  arising from filing  Uniform
Commercial Code financing  statements  regarding leases;  (xi) Liens on property
of, or on shares of stock or Indebtedness  of, any  corporation  existing at the
time such corporation becomes, or becomes a part of, any Restricted  Subsidiary;
PROVIDED that such Liens do not extend to or cover any property or assets of GST
or any Restricted  Subsidiary other than the property or assets acquired;  (xii)
Liens in favor of GST or any  Restricted  Subsidiary;  (xiii) Liens arising from
the  rendering  of a final  judgment  or  order  against  GST or any  Restricted
Subsidiary that does not give rise to an Event of Default;  (xiv) Liens securing
reimbursement  obligations  with  respect  to letters  of credit  that  encumber
documents and other property relating to such letters of credit and the products
and  proceeds  thereof;  (xv) Liens in favor of customs and revenue  authorities
arising as a matter of law to secure  payment of  customs  duties in  connection
with the  importation  of  goods;  (xvi)  Liens  encumbering  customary  initial
deposits and margin deposits, and other Liens that are either within the general
parameters  customary in the  industry  and  incurred in the ordinary  course of
business, in each case, securing Indebtedness under Interest Rate Agreements and
Currency Agreements and forward contracts,  options,  future contracts,  futures
options or similar agreements or arrangements  designed to protect GST or any of
its Restricted  Subsidiaries from fluctuations in interest rates or the price of
commodities;  (xvii) Liens arising out of  conditional  sale,  title  retention,
consignment or similar arrangements for the sale of goods entered into by GST or
any of its  Restricted  Subsidiaries  in the  ordinary  course  of  business  in
accordance with the past practices of GST and its Restricted  Subsidiaries prior
to the Closing Date; and (xviii) Liens on or sales of receivables.

         "Redeemable  Stock"  means any class or series of Capital  Stock of any
Person that by its terms or otherwise  is (i)  required to be redeemed  prior to
the Stated Maturity of the Notes, (ii) redeemable at the option of the holder of
such class or series of Capital  Stock at any time prior to the Stated  Maturity
of the  Notes  or (iii)  convertible  into or  exchangeable  for  Capital  Stock
referred  to in clause  (i) or (ii)  above or  Indebtedness  having a  scheduled
maturity  prior to the Stated  Maturity of the Notes;  PROVIDED that any Capital
Stock that would not  constitute  Redeemable  Stock but for  provisions  thereof
giving holders  thereof the right to require such Person to repurchase or redeem
such Capital Stock upon the occurrence of an "asset sale" or "change of control"
occurring  prior to the  Stated  Maturity  of the  Notes  shall  not  constitute
Redeemable  Stock  if  the  "asset  sale"  or  "change  of  control"  provisions
applicable  to such Capital  Stock are no more  favorable to the holders of such
Capital Stock than the  provisions  contained in "Limitation on Asset Sales" and
"Repurchase  of Notes upon a Change of Control"  covenants  described  below and
such Capital Stock specifically provides that such Person will not repurchase or
redeem any such stock pursuant to such provision  prior to GST USA's  repurchase
of such Notes, as are required to be repurchased  pursuant to the "Limitation on
Asset  Sales"  and  "Repurchase  of Notes  upon a Change of  Control"  covenants
described below.

         "Restricted  Subsidiary"  means any  Subsidiary  of GST  other  than an
Unrestricted Subsidiary.

         "Significant  Subsidiary"  means,  at any  date of  determination,  any
Restricted  Subsidiary that,  together with its  Subsidiaries,  (i) for the most
recent  fiscal  year of GST,  accounted  for more  than 10% of the  consolidated
revenues of GST and its  Restricted  Subsidiaries  or (ii) as of the end of such
fiscal year,  was the owner of more than 10% of the  consolidated  assets of GST
and its Restricted Subsidiaries, all as set forth on the most recently available
consolidated financial statements of GST for such fiscal year.

         "Specified  Date" means any  redemption  date,  any Payment Date for an
Offer to Purchase,  or any date on which the Notes are due and payable  after an
Event of Default.

         "Stated  Maturity"  means,  (i) with respect to any debt security,  the
date  specified  in such  debt  security  as the  fixed  date on which the final
installment of principal of such debt security is due and payable and (ii) with

                                      -41-
<PAGE>
respect to any  scheduled  installment  of  principal of or interest on any debt
security,  the date  specified in such debt  security as the fixed date on which
such installment is due and payable.

         "Subsidiary"  means,  with  respect  to any  Person,  any  corporation,
association or other business  entity of which more than 50% of the voting power
of the outstanding Voting Stock is owned, directly or indirectly, by such Person
and one or more other Subsidiaries of such Person.

         "Temporary  Cash  Investment"  means any of the  following:  (i) direct
obligations of the United States of America or any agency thereof or obligations
fully and  unconditionally  guaranteed  by the  United  States of America or any
agency thereof,  (ii) time deposit  accounts,  certificates of deposit and money
market  deposits  maturing  within 180 days of the date of  acquisition  thereof
issued  by a bank or trust  company  which is  organized  under  the laws of the
United States of America, any state thereof or any foreign country recognized by
the United  States,  and which bank or trust  company has  capital,  surplus and
undivided profits  aggregating in excess of $50 million (or the foreign currency
equivalent thereof) and has outstanding debt which is rated "A" (or such similar
equivalent rating) or higher by at least one nationally  recognized  statistical
rating  organization  (as defined in Rule 436 under the  Securities  Act) or any
money-market  fund  sponsored  by a  registered  broker  dealer or  mutual  fund
distributor,  (iii) repurchase  obligations with a term of not more than 30 days
for  underlying  securities  of the types  described in clause (i) above entered
into with a bank meeting the qualifications described in clause (ii) above, (iv)
commercial paper,  maturing not more than 90 days after the date of acquisition,
issued by a  corporation  (other  than an  Affiliate  of GST)  organized  and in
existence  under the laws of the United States of America,  any state thereof or
any foreign country  recognized by the United States of America with a rating at
the  time as of which  any  investment  therein  is made of  "P-1"  (or  higher)
according to Moody's Investors  Service,  Inc. or "A-1" (or higher) according to
Standard & Poor's  Ratings  Group,  and (v)  securities  with  maturities of six
months or less from the date of acquisition issued or fully and  unconditionally
guaranteed  by any state,  commonwealth  or  territory  of the United  States of
America, or by any political  subdivision or taxing authority thereof, and rated
at least "A" by Standard & Poor's  Ratings Group or Moody's  Investors  Service,
Inc.

         "Tomen" means Tomen Corporation or its Affiliates.

         "Tomen  Facility"  means,  collectively,  the  Tomen  Master  Agreement
together with all other agreements  (including credit  agreements),  instruments
and documents executed or delivered pursuant thereto or in connection therewith,
in each  case as such  agreements,  instruments  or  documents  may be  amended,
supplemented,  extended,  renewed,  replaced or otherwise  modified from time to
time.

         "Tomen Master Agreement" means the Master Agreement,  dated October 24,
1994, among Tomen America,  GST (formerly known as Greenstar  Telecommunications
Inc.), GST Telecom Inc., PNI, Pacwest and GST Pacific Lightwave,  Inc. (formerly
known as Pacific Lightwave, Inc.)

         "Transaction  Date"  means,  with  respect  to  the  Incurrence  of any
Indebtedness  by  GST  or any of its  Restricted  Subsidiaries,  the  date  such
Indebtedness is to be Incurred and, with respect to any Restricted Payment,  the
date such Restricted Payment is to be made.

         "Unrestricted  Subsidiary"  means (i) any Subsidiary of GST that at the
time of  determination  shall be  designated an  Unrestricted  Subsidiary by the
Board of Directors in the manner  provided  below and (ii) any  Subsidiary of an
Unrestricted  Subsidiary.  The Board of Directors may  designate any  Restricted
Subsidiary (including any newly acquired or newly formed Subsidiary), other than
GST USA or a Subsidiary Guarantor,  to be an Unrestricted Subsidiary unless such
Subsidiary  owns any Capital Stock of, or owns or holds any Lien on any property
of, GST or any Restricted Subsidiary; PROVIDED that either (A) the Subsidiary to
be so  designated  has total assets of $1,000 or less or (B) if such  Subsidiary
has assets greater than $1,000,  that such designation  would be permitted under
the "Limitation on Restricted  Payments"  covenant described below. The Board of
Directors  may  designate  any  Unrestricted   Subsidiary  to  be  a  Restricted
Subsidiary  of GST;  PROVIDED  that  immediately  after  giving  effect  to such
designation (x) GST could Incur $1.00 of additional Indebtedness under the first
paragraph of the "Limitation on Indebtedness"  covenant  described below and (y)
no Default or Event of Default shall have occurred and be  continuing.  Any such
designation  by the Board of  Directors  shall be  evidenced  to the  Trustee by
promptly

                                      -42-
<PAGE>
filing with the  Trustee a copy of the Board  Resolution  giving  effect to such
designation  and an  Officers'  Certificate  certifying  that  such  designation
complied with the foregoing provisions.

         "Voting  Stock" means with respect to any Person,  Capital Stock of any
class or kind ordinarily having the power to vote for the election of directors,
managers or other voting members of the governing body of such Person.

         "Wholly  Owned"  means,  with respect to any  Subsidiary of any Person,
such  Subsidiary  if all of the  outstanding  Capital  Stock in such  Subsidiary
(other than any director's qualifying shares or Investments by foreign nationals
mandated by applicable  law) is owned by such Person or one or more Wholly Owned
Subsidiaries of such Person.

COVENANTS

LIMITATION ON INDEBTEDNESS

         (a) Under the terms of the Indenture, GST will not, and will not permit
any of its Restricted  Subsidiaries to, Incur any  Indebtedness  (other than the
Notes,  the Convertible  Notes and  Indebtedness  existing on the Closing Date);
PROVIDED that GST and GST USA may Incur  Indebtedness if, after giving effect to
the  Incurrence  of such  Indebtedness  and the receipt and  application  of the
proceeds therefrom,  the Indebtedness to EBITDA Ratio would be greater than zero
and less than 5:1.

         Notwithstanding  the  foregoing,  GST  and  any  Restricted  Subsidiary
(except  as  specified  below)  may  Incur  each and all of the  following:  (i)
Indebtedness   outstanding  at  any  time   (including,   but  not  limited  to,
Indebtedness  under the Tomen Facility) in an aggregate  principal amount not to
exceed  $100  million,  less any amount of  Indebtedness  permanently  repaid as
provided under the "Limitation on Asset Sales" covenant  described  below;  (ii)
Indebtedness  (A) to GST  evidenced  by a  promissory  note or (B) to any of its
Restricted Subsidiaries; PROVIDED that any subsequent event which results in any
such  Restricted  Subsidiary  ceasing  to  be a  Restricted  Subsidiary  or  any
subsequent  transfer  of  such  Indebtedness  (other  than  to  GST  or  another
Restricted  Subsidiary)  shall  be  deemed,  in  each  case,  to  constitute  an
Incurrence  of such  Indebtedness  not  permitted  by this  clause  (ii);  (iii)
Indebtedness  issued in exchange  for, or the net  proceeds of which are used to
refinance or refund,  then  outstanding  Indebtedness,  other than  Indebtedness
Incurred under clause (i), (ii),  (iv),  (v), (vii) or (viii) of this paragraph,
and any refinancings thereof in an amount not to exceed the amount so refinanced
or refunded (plus premiums, accrued interest, fees and expenses);  PROVIDED that
Indebtedness the proceeds of which are used to refinance or refund the Notes and
the Notes Guarantee or the Convertible Notes and Convertible Notes Guarantee, as
the case may be, or  Indebtedness  that is PARI PASSU with, or  subordinated  in
right of payment to, the Notes and the Notes Guarantee or Convertible  Notes and
the  Convertible  Notes  Guarantee,  as the case may be, shall only be permitted
under  this  clause  (iii) if (A) in case the Notes and the Notes  Guarantee  or
Convertible Notes and the Convertible  Notes Guarantee,  as the case may be, are
refinanced in part or the  Indebtedness  to be refinanced is PARI PASSU with the
Notes  or  Notes  Guarantee  or  the  Convertible  Notes  or  Convertible  Notes
Guarantee,  as the case may be,  such new  Indebtedness,  by its terms or by the
terms of any agreement or instrument  pursuant to which such new Indebtedness is
outstanding,  is  expressly  made PARI PASSU with,  or  subordinate  in right of
payment to, the remaining Notes or Notes  Guarantee or the Convertible  Notes or
Convertible Notes Guarantee, as the case may be, (B) in case the Indebtedness to
be  refinanced  is  subordinated  in  right  of  payment  to the  Notes or Notes
Guarantee or the Convertible Notes or Convertible  Notes Guarantee,  as the case
may be, such new Indebtedness,  by its terms or by the terms of any agreement or
instrument pursuant to which such new Indebtedness is outstanding,  is expressly
made  subordinate  in right of  payment to the Notes or Notes  Guarantee  or the
Convertible Notes or Convertible  Notes Guarantee,  as the case may be, at least
to the extent that the  Indebtedness  to be  refinanced is  subordinated  to the
Notes or the Notes  Guarantee  or the  Convertible  Notes or  Convertible  Notes
Guarantee,  as the case may be, and (C) such new Indebtedness,  determined as of
the date of  Incurrence of such new  Indebtedness,  does not mature prior to the
Stated  Maturity of the  Indebtedness  to be  refinanced  or  refunded,  and the
Average Life of such new Indebtedness is at least equal to the remaining Average
Life of the Indebtedness to be refinanced or refunded; and PROVIDED FURTHER that
in no event may  Indebtedness  of GST or GST USA be  refinanced  by means of any
Indebtedness of any Restricted Subsidiary of GST or GST USA, as the case may be,
pursuant to this clause (iii);  (iv) Indebtedness (A) in respect of performance,
surety or appeal bonds  provided in the ordinary  course of business,  (B) under
Currency Agreements and Interest

                                      -43-
<PAGE>
Rate Agreements;  PROVIDED that such agreements do not increase the Indebtedness
of the obligor outstanding at any time other than as a result of fluctuations in
foreign  currency  exchange  rates  or  interest  rates  or by  reason  of fees,
indemnities and compensation payable thereunder; and (C) arising from agreements
providing  for   indemnification,   adjustment  of  purchase  price  or  similar
obligations,   or  from  Guarantees  or  letters  of  credit,  surety  bonds  or
performance  bonds  securing  any  obligations  of GST or any of the  Restricted
Subsidiaries  pursuant to such  agreements,  in any case  Incurred in connection
with the  disposition  of any business,  assets or Restricted  Subsidiary of GST
(other than Guarantees of Indebtedness  Incurred by any Person  acquiring all or
any portion of such business, assets or Restricted Subsidiary for the purpose of
financing  such  acquisition),  in a  principal  amount  not to exceed the gross
proceeds  actually  received by GST or any  Restricted  Subsidiary in connection
with such  disposition;  (v) Indebtedness of GST not to exceed,  at any one time
outstanding,  two times the Net Cash Proceeds  received by GST after the Closing
Date from the  issuance  and sale of its Capital  Stock  (other than  Redeemable
Stock or Preferred  Stock) to a Person other than a Subsidiary of GST;  PROVIDED
that such  Indebtedness  (x) does not mature prior to the Stated Maturity of the
Notes and has an Average Life longer than the Notes and (y) is  subordinated  to
the Notes or the  Notes  Guarantee,  as the case may be, at least to the  extent
that the Convertible  Notes or Convertible  Notes Guarantee are  subordinated to
Senior  Indebtedness;  (vi)  Indebtedness  to the extent  such  Indebtedness  is
secured by Liens  permitted  under  clause (v) of the  second  paragraph  of the
"Limitation on Liens" covenant described below; (vii) Indebtedness of GST or GST
USA under one or more  revolving  credit or  working  capital  facilities  in an
aggregate  principal amount  outstanding at any time not to exceed the lesser of
(A) $20  million  and (B) 50% of the  consolidated  book  value of the  accounts
receivable of GST and its Restricted  Subsidiaries;  and (viii)  Indebtedness of
GST or GST USA,  to the extent the  proceeds  thereof  are  immediately  used to
purchase  Notes tendered in an Offer to Purchase made as a result of a Change of
Control.

         (b) For purposes of determining  any particular  amount of Indebtedness
under this "Limitation on  Indebtedness"  covenant,  (1)  Indebtedness  Incurred
under the Tomen  Facility  on or prior to the  Closing  Date shall be treated as
Incurred  pursuant to clause (i) of the second  paragraph of this "Limitation on
Indebtedness" covenant and (2) Guarantees,  Liens or obligations with respect to
letters  of  credit   supporting   Indebtedness   otherwise   included   in  the
determination of such particular  amount shall not be included.  For purposes of
determining  compliance with this "Limitation on Indebtedness"  covenant, in the
event that an item of  Indebtedness  meets the  criteria of more than one of the
types  of  Indebtedness  described  in the  above  clauses,  GST,  in  its  sole
discretion,  shall  classify such item of  Indebtedness  and only be required to
include the amount and type of such Indebtedness in one of such clauses.

LIMITATION ON RESTRICTED PAYMENTS

         Under the terms of the Indenture, GST will not, and will not permit any
Restricted  Subsidiary  to,  directly  or  indirectly,  (i)  declare  or pay any
dividend or make any  distribution on its Capital Stock (other than dividends or
distributions  payable solely in shares of its or such  Restricted  Subsidiary's
Capital  Stock  (other  than  Redeemable  Stock) of the same  class held by such
holders  or in  options,  warrants  or other  rights to acquire  such  shares of
Capital  Stock) held by Persons other than the Company or any of its  Restricted
Subsidiaries (and other than pro rata dividends or distributions on Common Stock
of Restricted Subsidiaries),  (ii) purchase, redeem, retire or otherwise acquire
for value any shares of Capital  Stock of GST  (including  options,  warrants or
other rights to acquire such shares of Capital Stock) held by Persons other than
any Wholly Owned  Restricted  Subsidiaries  of GST,  (iii) make any voluntary or
optional principal  payment,  or voluntary or optional  redemption,  repurchase,
defeasance, or other acquisition or retirement for value, of Indebtedness of GST
or GST USA that is  subordinated  in right of  payment to the Notes or the Notes
Guarantee,  or (iv) make any Investment,  other than a Permitted Investment,  in
any Person (such payments or any other actions  described in clauses (i) through
(iv) being  collectively  "Restricted  Payments")  if, at the time of, and after
giving  effect to, the proposed  Restricted  Payment:  (A) a Default or Event of
Default shall have occurred and be continuing,  (B) GST could not Incur at least
$1.00  of  Indebtedness   under  the  first  paragraph  of  the  "Limitation  on
Indebtedness"  covenant or (C) the aggregate  amount of all Restricted  Payments
(the amount,  if other than in cash, to be determined in good faith by the Board
of Directors,  whose  determination shall be conclusive and evidenced by a Board
Resolution)  made after the Closing  Date shall exceed the sum of (1) 50% of the
aggregate  amount of the Adjusted  Consolidated  Net Income (or, if the Adjusted
Consolidated  Net Income is a loss,  minus 100% of such amount)  (determined  by
excluding  income  resulting  from  transfers  of assets by GST or a  Restricted
Subsidiary to an Unrestricted  Subsidiary)  accrued on a cumulative basis during
the period (taken as one  accounting  period)  beginning on the first day of the
fiscal quarter immediately following the Closing Date and ending on the last day
of the last fiscal quarter preceding the Transaction Date for which reports have
been filed

                                      -44-
<PAGE>
pursuant to the  "Commission  Reports and Reports to Holders"  covenant plus (2)
the aggregate Net Cash Proceeds  received by GST after the Closing Date from the
issuance and sale  permitted by the  Indentures of its Capital Stock (other than
Redeemable  Stock)  to a  Person  who is not a  Subsidiary  of GST,  or from the
issuance to a Person who is not a Subsidiary of GST of any options,  warrants or
other  rights to acquire  Capital  Stock of GST (in each case,  exclusive of any
Redeemable Stock or any options, warrants or other rights that are redeemable at
the option of the holder,  or are required to be  redeemed,  prior to the Stated
Maturity  of the  Notes)  plus  (3) an  amount  equal  to the net  reduction  in
Investments  (other than  reductions  in  Permitted  Investments)  in any Person
resulting from payments of interest on  Indebtedness,  dividends,  repayments of
loans or  advances,  or other  transfers  of assets,  in each case to GST or any
Restricted  Subsidiary (except to the extent any such payment is included in the
calculation of Adjusted  Consolidated  Net Income),  or from  redesignations  of
Unrestricted  Subsidiaries  as Restricted  Subsidiaries  (valued in each case as
provided  in the  definition  of  "Investments"),  not to exceed  the  amount of
Investments  previously  made  by GST and its  Restricted  Subsidiaries  in such
Person.

         The  foregoing  provision  will not be  violated  by reason of: (i) the
payment of any dividend within 60 days after the date of declaration thereof if,
at said date of  declaration,  such  payment  would  comply  with the  foregoing
paragraph; (ii) the redemption,  repurchase,  defeasance or other acquisition or
retirement for value of  Indebtedness  of GST or GST USA that is subordinated in
right of payment to the Notes Guarantee or the Notes including premium,  if any,
and accrued  and unpaid  interest,  with the  proceeds  of, or in exchange  for,
Indebtedness  Incurred  under  clause  (iii)  of  the  second  paragraph  of the
"Limitation on Indebtedness" covenant; (iii) the repurchase, redemption or other
acquisition of Capital Stock of GST in exchange for, or out of the proceeds of a
substantially  concurrent  offering  of,  shares of Capital  Stock  (other  than
Redeemable Stock) of GST; (iv) the acquisition of Indebtedness of GST or GST USA
that is  subordinated in right of payment to the Notes Guarantee or the Notes in
exchange for, or out of the proceeds of, a substantially concurrent offering of,
shares of the Capital Stock of GST (other than Redeemable  Stock);  (v) payments
or distributions,  in the nature of satisfaction of dissenters' rights, pursuant
to or in  connection  with a  consolidation,  merger or  transfer of assets that
complies  with  the  provisions  of  the   Indentures   applicable  to  mergers,
consolidations  and  transfers of all or  substantially  all of the property and
assets of GST USA or GST; (vi) Investments in any Person or Persons, the primary
business of which is related,  ancillary or complementary to the business of GST
and its Restricted Subsidiaries on the date of such Investments, in an aggregate
amount not to exceed (A) $10.0  million  plus, in any fiscal year, an amount not
to exceed 10% of GST's EBITDA for the  immediately  preceding  fiscal year, less
(B) any amounts used to repurchase  Common Shares  pursuant to clause (x) below;
(vii) a pro rata  dividend or  distribution  to all holders of GST Common Shares
(on a fully  diluted  basis)  of up to an  aggregate  of 10% of the  outstanding
Common Stock of NACT in  conjunction  with or following an  underwritten  public
offering of Common Stock of NACT pursuant to an effective registration statement
under the Securities Act; (viii) an Investment by GST or a Restricted Subsidiary
in a Person,  50% or more of the Capital  Stock of which is owned by a Permitted
Joint Venture Partner,  formed to own,  construct or operate an alternate access
network and provide related telecommunications  services; PROVIDED the aggregate
amount of such Investment does not exceed $3.0 million;  (ix) Investments by GST
or a  Restricted  Subsidiary  made  pursuant  to  the  second  paragraph  of the
"Limitation on Investments"  covenant, in an aggregate amount not to exceed $3.0
million; (x) repurchases of up to 43,093 Common Shares from Quest Capital Corp.,
at their then market  value,  pursuant to  agreements  in  existence on the date
hereof; and (xi) with respect to the Indenture, (A) cash payments in lieu of the
issuance of  fractional  Common  Shares  upon  conversion  (including  mandatory
conversion) of the  Convertible  Notes provided for in the indenture under which
the Convertible  Notes were issued (the  "Convertible  Notes Indenture") and (B)
repurchases of Convertible Notes pursuant to the "Limitation on Asset Sales" and
"Repurchase  of Notes upon a Change of  Control"  covenants  in the  Convertible
Notes Indenture;  PROVIDED that no such  repurchases  shall be made prior to GST
USA's repurchase of such Notes as are required to be repurchased pursuant to the
"Limitation  on Asset Sales" and  "Repurchase of Notes upon a Change of Control"
covenants in the Indenture; PROVIDED that, except in the case of clauses (i) and
(iii),  no Default or Event of Default  shall have occurred and be continuing or
occur as a consequence of the actions or payments set forth herein.

         Each Restricted Payment permitted  pursuant to the preceding  paragraph
(other than the Restricted Payment referred to in clause (ii) thereof),  and the
Net Cash  Proceeds  from any  issuance of Capital  Stock  referred to in clauses
(iii) or (iv) shall be included in calculating  whether the conditions of clause
(C) of the first paragraph of this "Limitation on Restricted  Payments" covenant
have been met with respect to any subsequent  Restricted Payments.  In the event
the proceeds of an issuance of Capital Stock of GST are used for the redemption,
repurchase or other  acquisition of the Notes or Convertible  Notes, as the case
may be, or Indebtedness that is PARI PASSU with the Notes

                                      -45-
<PAGE>
or  Convertible  Notes,  as the case may be, then the Net Cash  Proceeds of such
issuance  shall  be  included  in  clause  (C) of the  first  paragraph  of this
"Limitation  on Restricted  Payments"  covenant only to the extent such proceeds
are  not  used  for  such  redemption,   repurchase  or  other   acquisition  of
Indebtedness.

LIMITATION ON DIVIDEND AND OTHER PAYMENT RESTRICTIONS AFFECTING RESTRICTED 
SUBSIDIARIES

         Under the terms of the Indenture, GST will not, and will not permit any
Restricted Subsidiary to, create or otherwise cause or suffer to exist or become
effective any  consensual  encumbrance or restriction of any kind on the ability
of  any   Restricted   Subsidiary  to  (i)  pay  dividends  or  make  any  other
distributions  permitted  by  applicable  law  on  any  Capital  Stock  of  such
Restricted Subsidiary owned by GST or any other Restricted Subsidiary,  (ii) pay
any  Indebtedness  owed to GST or any other  Restricted  Subsidiary,  (iii) make
loans or advances to GST or any other Restricted Subsidiary or (iv) transfer any
of its property or assets to GST or any other Restricted Subsidiary.

         The  foregoing   provisions  will  not  restrict  any  encumbrances  or
restrictions:  (i) existing on the Closing Date in the  Indentures  or any other
agreement  in effect on the  Closing  Date,  and any  extensions,  refinancings,
renewals or replacements of such agreements;  PROVIDED that the encumbrances and
restrictions in any such extensions,  refinancings, renewals or replacements are
no less favorable in any material respect to the Holders than those encumbrances
or restrictions that are then in effect and that are being extended, refinanced,
renewed or replaced;  (ii) existing under or by reason of applicable  law; (iii)
existing  with  respect to any Person or the  property  or assets of such Person
acquired  by GST or any  Restricted  Subsidiary,  existing  at the  time of such
acquisition and not incurred in  contemplation  thereof,  which  encumbrances or
restrictions  are not  applicable to any Person or the property or assets of any
Person  other  than such  Person  or the  property  or assets of such  Person so
acquired;  (iv)  in the  case of  clause  (iv) of the  first  paragraph  of this
"Limitation  on Dividend and Other  Payment  Restrictions  Affecting  Restricted
Subsidiaries"  covenant, (A) that restrict in a customary manner the subletting,
assignment  or  transfer  of any  property  or asset  that is a lease,  license,
conveyance or contract or similar  property or asset,  (B) existing by virtue of
any transfer of, agreement to transfer, option or right with respect to, or Lien
on, any property or assets of GST or any  Restricted  Subsidiary  not  otherwise
prohibited by the  Indenture or (C) arising or agreed to in the ordinary  course
of business, not relating to any Indebtedness,  and that do not, individually or
in the  aggregate,  detract  from the value of  property or assets of GST or any
Restricted   Subsidiary  in  any  manner  material  to  GST  or  any  Restricted
Subsidiary;  (v) with respect to a Restricted Subsidiary and imposed pursuant to
an agreement  that has been entered into for the sale or  disposition  of all or
substantially  all of the  Capital  Stock of, or  property  and assets of,  such
Restricted  Subsidiary;  (vi) with respect to any Development  Company,  imposed
pursuant to or in connection with any Indebtedness  Incurred by such Development
Company  to  finance  at  least  50% of the  total  financing  required  for the
development and  construction of all of such Development  Company's  alternative
access  networks or any  Indebtedness  Incurred  to  refinance  or replace  such
Indebtedness;   PROVIDED  (a)  such  Indebtedness  (including  such  refinancing
Indebtedness) is permitted to be Incurred under the "Limitation on Indebtedness"
covenant  described  above,  (b) such  encumbrances and restrictions are no more
restrictive in any material  respect than those  encumbrances  and  restrictions
existing  under the Tomen Facility as in effect on the Closing Date and (c) such
encumbrances and restrictions  shall only apply to such Development  Company for
so  long  as  such  Indebtedness  (or  such  refinancing  Indebtedness)  remains
outstanding;  or (vii) with respect to any  Development  Company (a  "Restricted
Development   Company"),   imposed   pursuant  to  or  in  connection  with  any
Indebtedness  Incurred by another Development Company to finance at least 50% of
the total financing required for the development and construction of all of such
other  Development  Company's  alternative  access networks or any  Indebtedness
Incurred  to  refinance  or  replace  such   Indebtedness;   PROVIDED  (a)  such
encumbrances  and  restrictions  shall not apply to such Restricted  Development
Company prior to the  occurrence of an event of default under such  Indebtedness
(or refinancing Indebtedness), (b) such Indebtedness (including such refinancing
Indebtedness) is permitted to be Incurred under the "Limitation on Indebtedness"
covenant,  (c) such encumbrances and restrictions are no more restrictive in any
material  respect than those  contemplated by the Tomen Facility as in effect on
the Closing  Date and (d) at least 50% of the total  financing  required for the
development and  construction of all of such  Restricted  Development  Company's
alternative  access  networks was provided by the holder of the  Indebtedness of
such other Development Company.

         Nothing  contained in this  "Limitation  on Dividend and Other  Payment
Restrictions Affecting Restricted Subsidiaries" covenant will prevent GST or any
Restricted  Subsidiary  from (1) creating,  incurring,  assuming or suffering to
exist any Liens otherwise permitted in the "Limitation on Liens" covenant or (2)
restricting the sale or

                                      -46-
<PAGE>
other  disposition  of  property  or  assets  of GST  or  any of its  Restricted
Subsidiaries  that  secure   Indebtedness  of  GST  or  any  of  its  Restricted
Subsidiaries.

LIMITATION ON THE ISSUANCE AND SALE OF CAPITAL STOCK OF RESTRICTED SUBSIDIARIES

         Under  the  terms of the  Indenture,  GST will not  sell,  and will not
permit any Restricted Subsidiary,  directly or indirectly,  to issue or sell any
shares of Capital Stock of a Restricted Subsidiary (including options,  warrants
or other rights to purchase shares of such Capital Stock) except (i) to GST or a
Wholly Owned Restricted Subsidiary; (ii) issuances or sales to foreign nationals
of shares of Capital  Stock of foreign  Restricted  Subsidiaries,  to the extent
required by applicable  law; (iii) if,  immediately  after giving effect to such
issuance  or sale,  such  Restricted  Subsidiary  would no longer  constitute  a
Restricted Subsidiary; (iv) Common Stock of NACT, provided that (x) the proceeds
of any such sale under this  clause  (iv)  shall be applied in  accordance  with
clause (A) or (B) of the first  paragraph  of the  "Limitation  on Asset  Sales"
covenant  described  below or (y) the issuance of such Common Stock is permitted
by and made in  accordance  with  clause  (vii) of the second  paragraph  of the
"Limitation  on  Restricted  Payments"  covenant;  (v) sales of up to 10% of the
Common Stock of any Development Company to Tomen, so long as Tomen has agreed in
writing  to  provide  at  least  50% of the  total  financing  required  for the
development  and   construction  of  an  alternative   access  network  by  such
Development Company,  upon terms no more favorable to Tomen than the cost of the
Capital Stock of such Development Company to GST or its Restricted Subsidiaries;
PROVIDED that the  Development  Company's  assets  consist  solely of (x) assets
relating to the  network to be  financed by Tomen or (y) assets  relating to any
other network  financed by Tomen if Tomen  purchased the same  percentage of the
Common Stock of the Development Company in conjunction with financing such other
networks;  PROVIDED,  however, that notwithstanding the foregoing,  GST will use
its  best  efforts  to  cause  all  of  the  outstanding  Capital  Stock  of its
Development  Companies  to be  owned  by  GST  or its  Wholly  Owned  Restricted
Subsidiaries or (vi) in the event Phoenix Fiber becomes a Restricted Subsidiary,
a sale of Common Stock of Phoenix Fiber to a Permitted  Joint  Venture  Partner,
and in connection and concurrently with such sale, a sale of Common Stock of GST
Tucson Lightwave, Inc. to the same Permitted Joint Venture Partner.

LIMITATION ON ISSUANCES OF GUARANTEES BY RESTRICTED SUBSIDIARIES

         Under the terms of the  Indenture,  GST will not permit any  Restricted
Subsidiary,  directly or indirectly, to Guarantee any Indebtedness of GST USA or
any Indebtedness of GST ("Guaranteed Indebtedness"),  unless (i) such Restricted
Subsidiary  simultaneously executes and delivers a supplemental indenture to the
Indenture providing for a Guarantee (a "Subsidiary Guarantee") of payment of the
Notes (in the case of Guaranteed Indebtedness of GST USA) or the Notes Guarantee
(in the case of Guaranteed  Indebtedness of GST) by such  Restricted  Subsidiary
and (ii) such Restricted Subsidiary waives and will not in any manner whatsoever
claim  or take the  benefit  or  advantage  of,  any  rights  of  reimbursement,
indemnity or  subrogation  or any other rights against GST, GST USA or any other
Restricted  Subsidiary as a result of any payment by such Restricted  Subsidiary
under  its  Subsidiary  Guarantee;  PROVIDED  that this  paragraph  shall not be
applicable to any Guarantee of any Restricted Subsidiary that (x) existed at the
time such Person  became a  Restricted  Subsidiary  and (y) was not  Incurred in
connection  with,  or in  contemplation  of, such Person  becoming a  Restricted
Subsidiary.  If the Guaranteed  Indebtedness is (A) PARI PASSU with the Notes or
the Notes Guarantee, then the Guarantee of such Guaranteed Indebtedness shall be
PARI  PASSU  with,  or  subordinated   to,  the  Subsidiary   Guarantee  or  (B)
subordinated  to the Notes or the Notes  Guarantee,  then the  Guarantee of such
Guaranteed  Indebtedness  shall be subordinated  to the Subsidiary  Guarantee at
least to the extent that the  Guaranteed  Indebtedness  is  subordinated  to the
Notes or the Notes Guarantee.

         Notwithstanding the foregoing, any Subsidiary Guarantee by a Restricted
Subsidiary  shall  provide  by its  terms  that it  shall be  automatically  and
unconditionally released and discharged upon (i) any sale, exchange or transfer,
to any  Person  not an  Affiliate  of GST of all of GST's  and  each  Restricted
Subsidiary's  Capital Stock in, or all or substantially  all the assets of, such
Restricted Subsidiary (which sale, exchange or transfer is not prohibited by the
Indenture) or (ii) the release or discharge of the Guarantee  which  resulted in
the creation of such Subsidiary  Guarantee,  except a discharge or release by or
as a result of payment under such Guarantee.


                                      -47-
<PAGE>
LIMITATION ON TRANSACTIONS WITH SHAREHOLDERS AND AFFILIATES

         Under the terms of the Indenture, GST will not, and will not permit any
Restricted  Subsidiary to, directly or indirectly,  enter into,  renew or extend
any transaction  (including,  without limitation,  the purchase,  sale, lease or
exchange of property or assets, or the rendering of any service) with any holder
(or any Affiliate of such holder) of 5% or more of any class of Capital Stock of
GST or any Restricted  Subsidiary or with any Affiliate of GST or any Restricted
Subsidiary,  except upon fair and  reasonable  terms no less favorable to GST or
such  Restricted  Subsidiary  than  could  be  obtained,  at the  time  of  such
transaction or, if such transaction is pursuant to a written  agreement,  at the
time of the  execution  of the  agreement  providing  therefor,  in a comparable
arm's-length  transaction  with a  Person  that  is  not  such  a  Holder  or an
Affiliate.

         The  foregoing  limitation  does not  limit,  and will not apply to (i)
transactions  (A)  approved  by a majority of the  disinterested  members of the
Board of Directors or (B) for which GST or a Restricted  Subsidiary  delivers to
the Trustee a written opinion of a nationally recognized investment banking firm
stating that the transaction is fair to GST or such Restricted Subsidiary from a
financial point of view; (ii) any transaction  solely between GST and any of its
Wholly Owned  Restricted  Subsidiaries or solely between Wholly Owned Restricted
Subsidiaries;  (iii) the  payment  of  reasonable  and  customary  regular  fees
(including  through the  issuance  of shares of Common  Stock of GST or options,
warrants or other  rights to acquire such shares) to directors of GST or GST USA
who are not  employees  of GST, GST USA or any of their  Subsidiaries;  (iv) any
payments or other transactions pursuant to any tax-sharing agreement between GST
and any other  Person  with  which GST files a  consolidated  tax return or with
which  GST is  part  of a  consolidated  group  for  tax  purposes;  or (v)  any
Restricted  Payments not prohibited by the  "Limitation on Restricted  Payments"
covenant.  Notwithstanding  the foregoing,  any transaction covered by the first
paragraph of this "Limitation on Transactions  with Shareholders and Affiliates"
covenant and not covered by clauses (ii)  through  (iv) of this  paragraph,  the
aggregate  amount of which  exceeds  $500,000  in  value,  must be  approved  or
determined to be fair in the manner provided for in clause (i)(A) or (B) above.

LIMITATION ON LIENS

         Under the terms of the Indenture, GST will not, and will not permit any
Restricted  Subsidiary to, create,  incur, assume or suffer to exist any Lien on
any of its assets or properties of any character, or any shares of Capital Stock
or  Indebtedness  of  any  Restricted   Subsidiary   (collectively,   "Protected
Property"),  without making effective  provision for all of the Notes (or in the
case of a Lien on Protected  Property of GST, the Notes Guarantee) and all other
amounts due under the Indenture to be directly  secured equally and ratably with
(or, if the  obligation or liability to be secured by such Lien is  subordinated
in  right  of  payment  to the  Notes  or the  Notes  Guarantee,  prior  to) the
obligation  or  liability  secured by such Lien.  The  security  interest in any
Protected  Property  granted in favor of the Notes or Notes Guarantee under this
paragraph  shall be  prior  to the  security  interest  granted  in favor of the
Convertible Notes or Convertible Notes Guarantee.

         The foregoing  limitation  does not apply to (i) Liens  existing on the
Closing Date; (ii) Liens granted after the Closing Date on any assets or Capital
Stock of GST or its  Restricted  Subsidiaries  created in favor of the  Holders;
(iii) Liens with  respect to the assets of a  Restricted  Subsidiary  granted by
such  Restricted  Subsidiary to GST or a Wholly Owned  Restricted  Subsidiary to
secure Indebtedness owing to GST or such other Restricted Subsidiary; (iv) Liens
securing Indebtedness that is Incurred to refinance secured Indebtedness that is
permitted  to be Incurred  under  clause  (iii) of the second  paragraph  of the
"Limitation on Indebtedness" covenant; PROVIDED that such Liens do not extend to
or cover any  property or assets of GST,  GST USA or any  Restricted  Subsidiary
other than the property or assets securing the  Indebtedness  being  refinanced;
(v) Liens upon or Capital Leases with respect to inventory or equipment acquired
or held by GST or any of its Restricted  Subsidiaries to secure all or a part of
the purchase price therefor or GST's or such Restricted Subsidiary's obligations
under  such  lease;  PROVIDED  that  such  Liens do not  extend  to or cover any
property or assets of GST or any Restricted  Subsidiary other than the inventory
or equipment acquired; (vi) Liens on assets or property of, or the Capital Stock
of, a Development Company securing Indebtedness Incurred under clause (i) of the
second  paragraph of the  "Limitation  on  Indebtedness"  covenant to finance at
least 50% of the total  financing for the  development  and  construction of the
alternative  access networks owned by such  Development  Company;  PROVIDED such
Liens do not  extend to or cover any other  property  or assets of GST or any of
its Restricted Subsidiaries; or (vii) Permitted Liens.


                                      -48-
<PAGE>
LIMITATION ON SALE-LEASEBACK TRANSACTIONS

         Under the terms of the Indenture, GST will not, and will not permit any
Restricted  Subsidiary to, enter into any sale-leaseback  transaction  involving
any of its assets or properties whether now owned or hereafter acquired, whereby
GST or a Restricted  Subsidiary sells or transfers such assets or properties and
then or  thereafter  leases such assets or properties or any part thereof or any
other assets or properties which GST or such Restricted Subsidiary,  as the case
may be,  intends to use for  substantially  the same  purpose or purposes as the
assets or properties sold or transferred.

         The  foregoing   restriction  does  not  apply  to  any  sale-leaseback
transaction if (i) the lease is for a period,  including  renewal rights, of not
in excess of three  years;  (ii) the lease  secures  or  relates  to  industrial
revenue or pollution control bonds;  (iii) the transaction is solely between GST
and any Wholly  Owned  Restricted  Subsidiary  or solely  between  Wholly  Owned
Restricted Subsidiaries;  or (iv) GST or such Restricted Subsidiary,  within six
months  after the sale or transfer  of any assets or  properties  is  completed,
applies  an amount  not less than the net  proceeds  received  from such sale in
accordance  with clause (A) or (B) of the first  paragraph of the "Limitation on
Asset Sales" covenant described below.

LIMITATION ON INVESTMENTS

         Under the terms of the Indenture, GST will not, and will not permit any
Restricted  Subsidiary to, (i) make any  Investment in any Person  (including an
Unrestricted  Subsidiary)  that during its most recent fiscal year derived or in
its current  fiscal year is expected by the Board of  Directors of GST to derive
more than $250,000 in revenues  from, or in its most recent fiscal year spent or
in its current fiscal year is expected by the Board of Directors of GST to spend
more than $250,000 on, operations or activities  located outside the continental
United States (other than in the State of Hawaii) (an "International  Business")
or  (ii)  acquire  or own  (directly  or  indirectly),  other  than  through  an
Unrestricted Subsidiary, any entity, business or asset that is primarily located
outside the continental United States (other than in the State of Hawaii) or any
right with respect to any of the foregoing (an "International Asset").

         Notwithstanding  the  foregoing,  and  subject  to the  "Limitation  on
Restricted Payments" covenant,  GST and its Restricted  Subsidiaries may make an
Investment in an Unrestricted  Subsidiary which owns,  intends to acquire or has
rights with respect to an International Business or International Asset provided
that the aggregate  amount of such  Investments  do not exceed (i) $13.0 million
plus,  in any fiscal  year,  an amount not to exceed 10% of GST's EBITDA for the
immediately  preceding fiscal year, less (ii) the amount of any Investments made
pursuant to the first paragraph,  or clause (vi) of the second paragraph, of the
"Limitation on Restricted  Payments"  covenant;  PROVIDED that the International
Business or International Assets are related,  ancillary or complementary to the
primary  business  of GST and its  Restricted  Subsidiaries  on the date of such
Investment.

LIMITATION ON ASSET SALES

         Under the terms of the Indenture, GST will not, and will not permit any
Restricted   Subsidiary  to,   consummate   any  Asset  Sale,   unless  (i)  the
consideration received by GST or such Restricted Subsidiary is at least equal to
the fair market value of the assets sold or disposed of and (ii) at least 85% of
the  consideration  received  consists of cash or  Temporary  Cash  Investments;
PROVIDED,  HOWEVER, that clause (ii) shall not apply to long-term assignments of
capacity in a network. In the event and to the extent that the Net Cash Proceeds
received  by GST or its  Restricted  Subsidiaries  from one or more Asset  Sales
occurring  on or after the Closing Date in any period of 12  consecutive  months
exceed 10% of Adjusted  Consolidated  Net Tangible Assets  (determined as of the
date  closest  to  the   commencement  of  such  12-month  period  for  which  a
consolidated balance sheet of GST and its Subsidiaries has been prepared),  then
GST shall or shall cause the relevant Restricted Subsidiary to (i) within twelve
months  after the date Net Cash  Proceeds  so  received  exceed 10% of  Adjusted
Consolidated  Net  Tangible  Assets (A) apply an amount equal to such excess Net
Cash Proceeds to permanently repay unsubordinated Indebtedness of GST or GST USA
or Indebtedness of any Restricted  Subsidiary (other than GST USA), in each case
owing to a Person other than GST or any of its  Restricted  Subsidiaries  or (B)
invest an equal amount,  or the amount not so applied pursuant to clause (A) (or
enter into a definitive  agreement  committing to so invest within twelve months
after the date of such agreement),  in property or assets of a nature or type or
that are used in a business (or in a

                                      -49-
<PAGE>
company  having  property  and  assets  of a nature  or type,  or  engaged  in a
business)  similar or related to the nature or type of the  property  and assets
of, or the business of, GST and its Restricted Subsidiaries existing on the date
of such investment (as determined in good faith by the Board of Directors, whose
determination  shall be conclusive and evidenced by a Board Resolution) and (ii)
apply (no later than the end of the  twelve-month  period  referred to in clause
(i)) such excess Net Cash Proceeds (to the extent not applied pursuant to clause
(i)) as provided in the following  paragraph of this "Limitation on Asset Sales"
covenant. The amount of such excess Net Cash Proceeds required to be applied (or
to be committed to be applied) during such  twelve-month  period as set forth in
clause (i) of the  preceding  sentence and not applied as so required by the end
of such period shall constitute "Excess Proceeds."

         If, as of the first day of any calendar month,  the aggregate amount of
Excess Proceeds not theretofore subject to an Offer to Purchase pursuant to this
"Limitation on Asset Sales" covenant  totals at least $5.0 million,  GST USA and
GST must commence,  not later than the fifteenth Business Day of such month, and
consummate  an  Offer  to  Purchase  from the  Holders  on a pro  rata  basis an
aggregate principal amount of Notes and Convertible Notes,  respectively,  equal
to the Excess  Proceeds on such date,  at a purchase  price equal to 101% of the
Accreted Value of the Notes,  plus, in each case,  accrued  interest (if any) to
the date of  purchase;  PROVIDED,  HOWEVER,  that no Offer to  Purchase  will be
required  to be  commenced  with  respect  to the  Convertible  Notes  until the
Business  Day  following  the Payment Date with respect to the Offer to Purchase
Notes  and  need  not  be  commenced  if the  Excess  Proceeds  remaining  after
application to the Notes purchased in such Offer to Purchase  applicable thereto
are less than $1.0 million; and PROVIDED FURTHER,  HOWEVER,  that no Convertible
Notes may be purchased  under this  "Limitation on Asset Sales"  covenant unless
GST USA  shall  have  purchased  all  Notes  tendered  pursuant  to the Offer to
Purchase applicable thereto.

REPURCHASE OF NOTES UPON A CHANGE OF CONTROL

         GST USA must commence,  within 30 days of the occurrence of a Change of
Control, and consummate an Offer to Purchase for all Notes then outstanding,  at
a purchase  price equal to 101% of the  Accreted  Value  thereof,  plus  accrued
interest  (if any) to the  Payment  Date.  Prior to the mailing of the notice to
Holders  commencing  such  Offer to  Purchase,  but in any event  within 30 days
following  any Change of  Control,  GST USA  covenants  to (i) repay in full all
indebtedness  of GST USA and GST that would prohibit the repurchase of the Notes
pursuant to such Offers to Purchase or (ii) obtain any requisite  consents under
instruments  governing  any such  indebtedness  of GST USA or GST to permit  the
repurchase of the Notes.  GST USA and GST will first comply with the covenant in
the  preceding  sentence  before  it  will  repurchase  Notes  pursuant  to this
"Repurchase of Notes upon a Change of Control" covenant.

         If GST USA is unable  to repay all  indebtedness  that  would  prohibit
repurchase  of the Notes or is unable to obtain the  consents  of the holders of
indebtedness,  if any, of GST USA or GST  outstanding at the time of a Change of
Control whose consent would be so required to permit the  repurchase of Notes or
otherwise  fails to purchase  any Notes,  then GST USA will have  breached  such
covenant. This breach will constitute an Event of Default under the Indenture if
it continues for a period of 30  consecutive  days after written notice is given
to GST USA by the Trustee or the Holders of at least 25% in aggregate  principal
amount  of the  Notes  outstanding.  In  addition,  the  failure  by GST  USA to
repurchase  Notes at the  conclusion of an Offer to Purchase will  constitute an
Event of Default without any waiting period or notice requirements.

         There  can be no  assurance  that GST USA will  have  sufficient  funds
available  at the  time of any  Change  of  Control  to make  any  debt  payment
(including  repurchases of Notes) required by the foregoing covenant (as well as
may be contained in other  securities of GST USA which might be  outstanding  at
the time).  The above  covenant  requiring GST USA to repurchase the Notes will,
unless the consents referred to above are obtained, require GST USA to repay all
indebtedness  then  outstanding  which by its  terms  would  prohibit  such Note
repurchase, either prior to or concurrently with such Note repurchase.

COMMISSION REPORTS AND REPORTS TO HOLDERS

         Whether  or not GST USA or GST is  required  to file  reports  with the
Commission,  if any Notes are  outstanding,  GST USA and GST shall file with the
Commission all such reports and other information as they would

                                      -50-
<PAGE>
be required  to file with the  Commission  by Sections  13(a) or 15(d) under the
Securities  Exchange Act of 1934, as amended.  See "Available  Information." GST
USA and GST will  supply the  Trustee and each Holder of Notes or will supply to
the Trustee for forwarding to each Holder,  without cost to such Holder,  copies
of such reports or other information.

EVENTS OF DEFAULT

         The  following  events are be defined  as  "Events of  Default"  in the
Indenture:  (a) default in the payment of principal of (or premium,  if any, on)
any Note or Convertible  Note, as the case may be, when the same becomes due and
payable at maturity, upon acceleration, redemption or otherwise, whether or not,
in the  case  of the  Convertible  Notes,  such  payment  is  prohibited  by the
provisions  described  above under " -- Ranking";  (b) default in the payment of
interest  on any Note or  Convertible  Note,  as the case may be,  when the same
becomes due and  payable,  and such default  continues  for a period of 30 days,
whether or not, in the case of the Convertible Notes, such payment is prohibited
by the provisions described under " -- Ranking";  (c) GST USA or GST defaults in
the performance of or breaches any other covenant or agreement of GST USA or GST
in the Indenture or Convertible  Notes  Indenture,  as the case may be, or under
the Notes or Convertible  Notes,  as the case may be, and such default or breach
continues  for a period  of 30  consecutive  days  after  written  notice by the
Trustee or the trustee under the Converted Notes Indenture or the Holders of 25%
or more in aggregate principal amount of Notes or Convertible Notes, as the case
may be; (d) there occurs with respect to any issue or issues of  Indebtedness of
GST USA,  GST or any  Significant  Subsidiary  having an  outstanding  principal
amount of $5 million or more in the  aggregate  for all such  issues of all such
Persons, whether such Indebtedness now exists or shall hereafter be created, (I)
an event  of  default  that has  caused  the  holder  thereof  to  declare  such
Indebtedness  to be due and  payable  prior  to its  Stated  Maturity  and  such
Indebtedness  has not been discharged in full or such  acceleration has not been
rescinded  or  annulled  within  30 days of such  acceleration  and/or  (II) the
failure to make a  principal  payment at the final (but not any  interim)  fixed
maturity and such defaulted payment shall not have been made, waived or extended
within 30 days of such  payment  default;  (e) any final  judgment or order (not
covered by  insurance)  for the  payment of money in excess of $5 million in the
aggregate  for all such  final  judgments  or orders  against  all such  Persons
(treating any deductibles,  self-insurance or retention as not so covered) shall
be rendered against GST USA, GST or any Significant  Subsidiary and shall not be
paid or  discharged,  and  there  shall be any  period  of 30  consecutive  days
following entry of the final judgment or order that causes the aggregate  amount
for all such final  judgments or orders  outstanding  and not paid or discharged
against all such Persons to exceed $5 million during which a stay of enforcement
of such final  judgment or order,  by reason of a pending  appeal or  otherwise,
shall not be in effect; (f) a court having jurisdiction in the premises enters a
decree or order for (A)  relief in respect  of GST USA,  GST or any  Significant
Subsidiary in an involuntary case under any applicable bankruptcy, insolvency or
other  similar law now or hereafter in effect,  (B)  appointment  of a receiver,
liquidator,  assignee,  custodian,  trustee, sequestrator or similar official of
GST USA, GST or any Significant  Subsidiary or for all or  substantially  all of
the property and assets of GST USA, GST or any Significant Subsidiary or (C) the
winding up or  liquidation  of the  affairs of GST USA,  GST or any  Significant
Subsidiary  and, in each case, such decree or order shall remain unstayed and in
effect  for a  period  of 30  consecutive  days;  or  (g)  GST  USA,  GST or any
Significant  Subsidiary  (A)  commences  a voluntary  case under any  applicable
bankruptcy,  insolvency  or other  similar law now or  hereafter  in effect,  or
consents  to the entry of an order for relief in an  involuntary  case under any
such law, (B) consents to the appointment of or taking possession by a receiver,
liquidator,  assignee,  custodian,  trustee, sequestrator or similar official of
GST USA, GST or any Significant  Subsidiary or for all or  substantially  all of
the  property and assets of GST USA, GST or any  Significant  Subsidiary  or (C)
effects any general assignment for the benefit of creditors.

         If an Event of Default  (other  than an Event of Default  specified  in
clause (f) or (g) above that occurs  with  respect to GST USA or GST) occurs and
is continuing under the Indenture, the Trustee or the Holders of at least 25% in
aggregate  principal amount of the Notes then outstanding,  by written notice to
GST USA (and to the Trustee if such notice is given by the  Holders),  may,  and
the Trustee at the request of such Holders shall, declare the Accreted Value of,
premium,  if any, and accrued  interest,  if any, on the Notes to be immediately
due and payable.  Upon a  declaration  of  acceleration,  such  Accreted  Value,
premium,  if any, and accrued  interest,  if any, shall be  immediately  due and
payable.  In the event of a  declaration  of  acceleration  because  an Event of
Default  set forth in clause  (d) above has  occurred  and is  continuing,  such
declaration of acceleration shall be automatically rescinded and annulled if the
event of default  triggering such Event of Default  pursuant to clause (d) shall
be remedied or cured by GST USA, GST or the relevant  Significant  Subsidiary or
waived by the holders of the relevant

                                      -51-
<PAGE>
Indebtedness  within 60 days after the declaration of acceleration  with respect
thereto. If an Event of Default specified in clause (f) or (g) above occurs with
respect to GST USA or GST, the Accreted Value of,  premium,  if any, and accrued
interest,  if any, on the Notes then outstanding  shall IPSO FACTO become and be
immediately  due and payable without any declaration or other act on the part of
either  Trustee or any Holder.  The Holders of at least a majority in  principal
amount  of the  outstanding  Notes,  by  written  notice  to GST  USA and to the
Trustee,  may waive all past  defaults  and rescind and annul a  declaration  of
acceleration and its  consequences if (i) all existing Events of Default,  other
than the  nonpayment of the principal of,  premium,  if any, and interest on the
Notes,  that have become due solely by such  declaration of  acceleration,  have
been  cured or  waived  and (ii) the  rescission  would  not  conflict  with any
judgment or decree of a court of competent  jurisdiction.  For information as to
the waiver of defaults, see " -- Modification and Waiver."

         The Holders of at least a majority in aggregate principal amount of the
outstanding  Notes may  direct  the time,  method  and place of  conducting  any
proceeding  for any remedy  available to the Trustee or exercising  any trust or
power conferred on the Trustee.  However,  such Trustee may refuse to follow any
direction  that  conflicts  with law or the  Indenture,  that may  involve  such
Trustee in personal liability, or that such Trustee determines in good faith may
be unduly  prejudicial  to the  rights of  Holders  of Notes not  joining in the
giving of such  direction  and may take any other action it deems proper that is
not  inconsistent  with any such  direction  received  from Holders of Notes.  A
Holder  may not pursue any remedy  with  respect to the  Indenture  or the Notes
unless: (i) the Holder gives the Trustee written notice of a continuing Event of
Default;  (ii) the  Holders  of at least 25% in  aggregate  principal  amount of
outstanding  Notes make a written  request to the  Trustee to pursue the remedy;
(iii) such Holder or Holders offer the Trustee  indemnity  satisfactory  to such
Trustee  against any costs,  liability  or expense;  (iv) such  Trustee does not
comply  with the  request  within 60 days after  receipt of the  request and the
offer of indemnity; and (v) during such 60-day period, the Holders of a majority
in aggregate principal amount of the outstanding Notes do not give the Trustee a
direction that is inconsistent  with the request.  However,  such limitations do
not  apply to the  right  of any  Holder  of a Note to  receive  payment  of the
principal  of,  premium,  if any, or interest on, such Note or to bring suit for
the  enforcement of any such payment,  on or after the due date expressed in the
Notes which  right shall not be impaired or affected  without the consent of the
Holder.

         The Indenture  requires certain officers of GST USA and GST to certify,
on or before a date not more than 90 days  after  the end of each  fiscal  year,
that a review has been  conducted  of the  activities  of GST USA or GST, as the
case may be, and its Restricted  Subsidiaries'  performance  under the Indenture
and that  GST USA or GST,  as the case may be,  has  fulfilled  all  obligations
thereunder,  or,  if there  has been a default  in the  fulfillment  of any such
obligation,  specifying each such default and the nature and status thereof. GST
USA and GST will also be  obligated  to notify  the  Trustee  of any  default or
defaults in the  performance of any covenants or agreements  under the Indenture
or Convertible Notes Indenture.

CONSOLIDATION, MERGER AND SALE OF ASSETS

         Under  the  terms  of the  Indenture,  neither  GST USA  nor  GST  will
consolidate  with,  merge  with or into,  or sell,  convey,  transfer,  lease or
otherwise  dispose of all or substantially all of its property and assets (as an
entirety or  substantially an entirety in one transaction or a series of related
transactions)  to, any Person (other than a consolidation or merger with or into
a Wholly Owned Restricted Subsidiary with a positive net worth);  PROVIDED that,
in connection with any such merger or  consolidation,  no  consideration  (other
than Common Stock in the  surviving  Person,  GST USA or GST) shall be issued or
distributed to the stockholders of GST USA or GST) or permit any Person to merge
with or into GST USA or GST unless:  (i) GST USA or GST shall be the  continuing
Person,  or  the  Person  (if  other  than  GST  USA  or  GST)  formed  by  such
consolidation  or into which GST USA or GST is merged or that acquired or leased
such property and assets of GST USA or GST shall be a corporation  organized and
validly  existing  under  the  laws  of the  United  States  of  America  or any
jurisdiction  thereof and shall expressly assume,  by a supplemental  indenture,
executed and delivered to the Trustee,  all of the obligations of GST USA on all
of the Notes and under the Indenture;  (ii)  immediately  after giving effect to
such  transaction,  no Default or Event of Default  shall have  occurred  and be
continuing;  (iii)  immediately after giving effect to such transaction on a pro
forma basis,  GST USA, GST or any Person  becoming the successor  obligor of the
Notes or the Guarantee  shall have a Consolidated  Net Worth equal to or greater
than  the  Consolidated  Net  Worth  of GST  USA or  GST,  as the  case  may be,
immediately prior to such  transaction;  (iv) immediately after giving effect to
such transaction on a pro forma basis GST USA or GST, as the case may be, or any
Person becoming the successor obligor of the

                                      -52-
<PAGE>
Notes or the Notes Guarantee  could Incur at least $1.00 of  Indebtedness  under
the first paragraph of the "Limitation on  Indebtedness"  covenant;  and (v) GST
USA or GST, as the case may be, delivers to the Trustee an Officers' Certificate
(attaching the arithmetic  computations  to demonstrate  compliance with clauses
(iii)  and (iv)) and an  Opinion  of  Counsel,  in each case  stating  that such
consolidation,  merger or transfer and such supplemental indenture complies with
this provision and that all conditions precedent provided for herein relating to
such transaction have been complied with; PROVIDED,  however, that clauses (iii)
and (iv) above do not apply if, in the good faith  determination of the Board of
Directors of GST, whose  determination shall be evidenced by a Board Resolution,
the  principal  purpose of such  transaction  is to change the  jurisdiction  of
incorporation  of GST USA or GST to a state of the United  States;  and provided
further  that any such  transaction  shall not have as one of its  purposes  the
evasion of the foregoing limitations.

DEFEASANCE

         DEFEASANCE AND DISCHARGE.  The Indenture  provides that GST USA will be
deemed to have paid and GST USA will be discharged  from any and all obligations
in respect of the Notes on the 123rd day after the  deposit  referred  to below,
and the  provisions of the Indenture will no longer be in effect with respect to
the Notes, (except for, among other matters, certain obligations to register the
transfer or exchange of the Notes, to replace stolen,  lost or mutilated  Notes,
to maintain  paying  agencies  and to hold monies for payment in trust if, among
other things, (A) GST USA has deposited with the Trustee, in trust, money and/or
U.S.  Government  Obligations that through the payment of interest and principal
in respect  thereof in  accordance  with their  terms will  provide  money in an
amount sufficient to pay the principal of, premium, if any, and accrued interest
on the Notes on the Stated  Maturity  of such  payments in  accordance  with the
terms of the Indenture  and the Notes,  (B) GST USA has delivered to the Trustee
(i)  either (x) an Opinion  of  Counsel  to the  effect  that  Holders  will not
recognize income,  gain or loss for United States federal income tax purposes as
a result of GST USA's or GST's  exercise of its option  under this  "Defeasance"
provision  and will be subject to United States  federal  income tax on the same
amount and in the same  manner and at the same times as would have been the case
if such deposit,  defeasance  and  discharge had not occurred,  which Opinion of
Counsel  must be based  upon  (and  accompanied  by a copy  of) a ruling  of the
Service to the same effect unless there has been a change in  applicable  United
States  federal  income tax law after the Closing  Date such that a ruling is no
longer  required  or (y) a ruling  directed  to the  Trustee  received  from the
Service to the same effect as the  aforementioned  Opinion of  Counsel;  (ii) an
Opinion of Counsel or a ruling from Revenue Canada,  Taxation to the effect that
Holders will not recognize income, gain or loss for Canadian federal, provincial
or territorial  income tax or other tax purposes as a result of such deposit and
defeasance and will be subject to Canadian federal or provincial  income tax and
other tax on the same amounts, in the same manner and at the same times as would
have  been the case  had such  deposit  and  defeasance  not  occurred  (and for
purposes of such opinion, such Canadian counsel shall assume that Holders of the
Notes include  Holders who are not resident in Canada);  and (iii) an Opinion of
Counsel to the effect that the creation of the defeasance trust does not violate
the  Investment  Company Act of 1940 and after the passage of 123 days following
the deposit,  the trust fund will not be subject to the effect of Section 547 of
the U.S.  Bankruptcy Code or Section 15 of the New York Debtor and Creditor Law,
(C)  immediately  after giving  effect to such deposit on a pro forma basis,  no
Event of  Default,  or event that after the giving of notice or lapse of time or
both would become an Event of Default,  shall have occurred and be continuing on
the date of such deposit or during the period  ending on the 123rd day after the
date of such deposit, and such deposit shall not result in a breach or violation
of, or constitute a default  under,  any other  agreement or instrument to which
GST  or any  of  its  Subsidiaries  is a  party  or by  which  GST or any of its
Subsidiaries  is  bound,  and (D) if at such  time the  Notes  are  listed  on a
national securities exchange, GST USA has delivered to the Trustee an Opinion of
Counsel to the effect  that the Notes will not be  delisted  as a result of such
deposit, defeasance and discharge.

         DEFEASANCE  OF CERTAIN  COVENANTS  AND CERTAIN  EVENTS OF DEFAULT.  The
Indenture  further provides that its provisions will no longer be in effect with
respect  to  clauses  (iii) and (iv)  under  "Consolidation,  Merger and Sale of
Assets" and all the covenants  described  herein under  "Covenants,"  clause (c)
under "Events of Default"  with respect to such  covenants and clauses (iii) and
(iv) under  "Consolidation,  Merger and Sale of Assets," and clauses (d) and (e)
under "Events of Default" will be deemed not to be Events of Default upon, among
other  things,  the deposit  with the  Trustee,  in trust,  of money and/or U.S.
Government  Obligations  that through the payment of interest  and  principal in
respect  thereof in accordance  with their terms will provide money in an amount
sufficient to pay the principal of, premium, if any, and accrued interest on the
Notes on the Stated Maturity of such payments

                                      -53-
<PAGE>
in accordance with the terms of the Indenture and the Notes the  satisfaction of
the  provisions  described  in  clauses  B(iii),  (C) and  (D) of the  preceding
paragraph and the delivery by GST USA to the Trustee of an Opinion of Counsel to
the effect that, among other things, the Holders will not recognize income, gain
or loss for United  States  federal  income tax  purposes or  Canadian  federal,
provincial or  territorial  income tax or other tax purposes as a result of such
deposit and  defeasance  of certain  covenants and Events of Default and will be
subject to United States federal  income tax and Canadian  federal or provincial
income tax on the same  amount  and in the same  manner and at the same times as
would have been the case if such deposit and defeasance had not occurred.

         DEFEASANCE AND CERTAIN OTHER EVENTS OF DEFAULT. In the event GST USA or
GST  exercises  its  option  to  omit  compliance  with  certain  covenants  and
provisions  of the  Indenture  with  respect  to the Notes as  described  in the
immediately  preceding  paragraph  and the Notes are  declared  due and  payable
because of the  occurrence of an Event of Default that remains  applicable,  the
amount of money and/or U.S.  Government  Obligations on deposit with the Trustee
will be  sufficient  to pay amounts due on the Notes at the time of their Stated
Maturity but may not be  sufficient  to pay amounts due on the Notes at the time
of the  acceleration  resulting  from such Event of Default.  However,  GST will
remain  liable for such  payments and the Notes  Guarantee  with respect to such
payments will remain in effect.

MODIFICATION AND WAIVER

         Modifications  and  amendments of the Indenture may be made by GST USA,
GST and the Trustee  with the consent of the Holders of not less than a majority
in aggregate principal amount of the outstanding Notes; PROVIDED,  HOWEVER, that
no such  modification  or  amendment  may,  without  the  consent of each Holder
affected  thereby,  (i) change the Stated  Maturity of the  principal of, or any
installment  of interest  on, any Note,  (ii) reduce the  Accreted  Value of, or
premium, if any, or interest on, any Note, (iii) change the place or currency of
payment of  principal  of, or premium,  if any, or interest  on, any Note,  (iv)
impair the right to  institute  suit for the  enforcement  of any  payment on or
after the Stated  Maturity  (or,  in the case of a  redemption,  on or after the
Redemption  Date)  of any  Note,  (v)  reduce  the  above-stated  percentage  of
outstanding  Notes the consent of whose  Holders is necessary to modify or amend
the Indenture,  (vi) waive a default in the payment of principal of, premium, if
any, or interest  on the Notes,  or (vii)  reduce the  percentage  or  aggregate
principal amount of outstanding  Notes the consent of whose Holders is necessary
for waiver of compliance with certain  provisions of the Indenture or for waiver
of certain defaults.

ADDITIONAL AMOUNTS

         Any payments made by GST under or with respect to the Notes pursuant to
the Notes  Guarantee  will be made free and clear of and without  withholding or
deduction for or on account of any present or future tax,  duty,  levy,  impost,
assessment or other governmental charge (including penalties, interest and other
liabilities related thereto) imposed or levied by or on behalf of the Government
of Canada or of any province or territory  thereof or by any authority or agency
therein or thereof  having  power to tax  (hereinafter  "Taxes"),  unless GST is
required  to  withhold  or  deduct  Taxes  by law or by  the  interpretation  or
administration  thereof. If GST is required to withhold or deduct any amount for
or on account of Taxes from any payment made under or with respect to the Notes,
GST will pay such additional amounts ("Additional Amounts") as may be necessary,
so that the net amount  received by each Holder of Notes  (including  Additional
Amounts)  after such  withholding  or deduction will not be less than the amount
such Holder would have received if such Taxes had not been withheld or deducted;
PROVIDED,  HOWEVER, that no Additional Amounts will be payable with respect to a
payment made to a Holder (an "Excluded Holder") (i) with which GST does not deal
at arm's length  (within the meaning of the Income Tax Act (Canada)) at the time
of making such payment,  or (ii) which is subject to such Taxes by reason of its
being connected with Canada or any province or territory  thereof otherwise than
solely by reason of the Holder's  activity in  connection  with  purchasing  the
Notes,  by the mere  holding of Notes or by reason of the  receipt  of  payments
thereunder.  GST will upon written request of any Holder (other than an Excluded
Holder),  reimburse  such  Holder,  for the amount of (i) any Taxes so levied or
imposed  and paid by such  Holder as a result  of  payments  made  under or with
respect to the Notes and (ii) any Taxes so levied or imposed with respect to any
reimbursement  under the  foregoing  clause (i), but excluding any such Taxes on
such  Holder's  net income so that the net amount  received by such Holder after
such  reimbursement  will not be less than the net amount the Holder  would have
received if Taxes on such reimbursement had not been imposed.

                                      -54-
<PAGE>
         At least 30 days prior to each date on which any payment  under or with
respect  to the  Notes  is due and  payable,  if GST  will be  obligated  to pay
Additional Amounts with respect to such payment, GST will deliver to the Trustee
an Officers'  Certificate  stating the fact that such Additional Amounts will be
payable  and the  amounts so payable  and will set forth such other  information
necessary to enable the Trustee to pay such Additional Amounts to Holders on the
payment date.  Whenever either in the Indenture or in this  Memorandum  there is
mentioned,  in any  context,  the payment of  principal  (or  premium,  if any),
Redemption Price,  interest or any other amount payable under or with respect to
any Note,  such  mention  shall be deemed to include  mention of the  payment of
Additional Amounts to the extent that, in such context,  Additional Amounts are,
were or would be payable in respect thereof.

         In the event that GST has become or would  become  obligated to pay, on
the next date on which any amount would be payable  under or with respect to the
Notes any Additional  Amounts as a result of certain changes affecting  Canadian
withholding  tax laws,  GST may redeem all,  but not less than all, the Notes as
the  case may be,  at any  time at 100% of the  Accreted  Value,  together  with
accrued  interest  thereon,  if any, to the  redemption  date. See " -- Optional
Redemption."

CONSENT TO JURISDICTION AND SERVICE

         GST has  appointed  Olshan  Grundman  Frome & Rosenzweig  LLP, 505 Park
Avenue,  New York,  New York  10022 as its agent for  service  of process in any
suit,  action or  proceeding  with respect to the Indenture or the Notes and for
actions brought under federal or state securities laws brought in any federal or
state  court  located  in the City of New York and will  agree to  submit to the
jurisdiction of such courts.

ENFORCEABILITY OF JUDGMENTS

         GST is  incorporated  in Canada.  Certain  directors and officers,  and
certain experts named herein,  are residents of Canada.  As a result,  it may be
difficult or impossible for U.S.  noteholders  to seek  enforcement of the Notes
Guarantee by effecting  service of process  within the United States upon GST or
such  directors,  officers and experts or to collect  judgments of United States
courts   predicated  upon  civil  liability  under  the  United  States  federal
securities and other laws.  GST believes that there is  substantial  doubt as to
whether  Canadian  courts would (i) enforce  judgments of United  States  courts
obtained against GST or such directors, officers and experts predicated upon the
civil liabilities provisions of United States laws or (ii) impose liabilities in
original actions against GST or its directors,  officers and experts  predicated
solely upon United States securities laws.

NO PERSONAL LIABILITY OF INCORPORATORS, SHAREHOLDERS, OFFICERS, DIRECTORS, OR 
EMPLOYEES

         The  Indenture  provides  that  no  recourse  for  the  payment  of the
principal of, premium,  if any, or interest on any of the Notes or for any claim
based thereon or otherwise in respect thereof, and no recourse under or upon any
obligation, covenant or agreement of GST USA or GST in such Indenture, or in any
of the Notes or because of the creation of any Indebtedness represented thereby,
shall be had against any incorporator,  shareholder, officer, director, employee
or controlling person of GST USA or GST or of any successor Person thereof. Each
Holder, by accepting the Notes, waives and releases all such liability.

CONCERNING THE TRUSTEE

         The  Indenture  provides  that,  except  during  the  continuance  of a
Default,  the Trustee  will not be liable,  except for the  performance  of such
duties as are  specifically  set forth in the Indenture.  If an Event of Default
has occurred and is continuing, the Trustee will use the same degree of care and
skill in its exercise as a prudent person would exercise under the circumstances
in the conduct of such person's own affairs.

         The Indenture and provisions of the Trust Indenture Act incorporated by
reference therein contain limitations on the rights of the Trustees, should they
become creditors of GST USA or GST, to obtain payment of claims in certain cases
or to realize on certain property  received by it in respect of any such claims,
as  security  or  otherwise.  The  Trustees  are  permitted  to  engage in other
transactions; PROVIDED, HOWEVER, that if either Trustee acquires any conflicting
interest, it must eliminate such conflict or resign.


                                      -55-
<PAGE>
             CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS

         In the opinion of Olshan  Grundman  Frome & Rosenzweig  LLP, the United
States tax counsel to the Company,  subject to the limitations set forth herein,
the  following is an accurate  summary of the  material  United  States  federal
income tax consequences of the purchase, ownership and disposition of the Notes.
This  summary  is based on current  provisions  of the  United  States  Internal
Revenue Code (the "Code"),  applicable final and temporary Treasury  Regulations
("Treasury    Regulations"),    proposed   Treasury    Regulations    ("Proposed
Regulations"),  judicial  authority,  and  current  administrative  rulings  and
pronouncements  of the Service and upon the facts  concerning  the Company as of
the date  hereof.  There can be no  assurance  that the Service  will not take a
contrary  view, and no ruling from the Service has been or will be sought by the
Company. Legislative, judicial, or administrative changes or interpretations may
be forthcoming  that could alter or modify the statements  and  conclusions  set
forth herein. Any such changes or interpretations  may or may not be retroactive
and could affect the tax consequences to holders.

         This  summary and the above  referenced  opinion do not purport to deal
with all aspects of taxation that may be relevant to  particular  Holders of the
Notes in light of their personal investment or tax circumstances,  or to certain
types of  investors  (including  insurance  companies,  financial  institutions,
broker-dealers or tax-exempt  organizations)  subject to special treatment under
the United States federal income tax laws.  This  discussion  does not deal with
special tax  situations,  such as the holding of the Notes as part of a straddle
with other  investments,  or  situations in which the  functional  currency of a
Holder who is a U.S. Holder is not the United States dollar.  In addition,  this
discussion  deals only with Notes held as capital  assets  within the meaning of
Section 1221 of the Code.

         As used in the discussion which follows,  the term "U.S.  Holder" means
an initial  beneficial  owner of the Notes that for United States federal income
tax  purposes  is (i) a  citizen  or  resident  of  the  United  States,  (ii) a
corporation,  partnership  or other entity  created or organized in or under the
laws of the United States or of any political  subdivision  thereof, or (iii) an
estate or trust the income of which is subject to United States  federal  income
taxation  regardless of its source; the term "Non-U.S.  Holder" means an initial
Holder of Notes that is, for United States  federal  income tax purposes,  not a
U.S. Holder; and the term "Holder" means a U.S. Holder or a "Non-U.S. Holder".

HOLDERS  SHOULD  CONSULT  THEIR  OWN  TAX  ADVISORS  AS TO  THE  PARTICULAR  TAX
CONSEQUENCES TO THEM OF PURCHASING, HOLDING AND DISPOSING OF THE NOTES INCLUDING
THE APPLICABILITY AND EFFECT OF ANY STATE, LOCAL OR FOREIGN TAX LAWS.

TREATMENT OF NOTES AS DEBT; CONSEQUENCES OF EXCHANGE OF OLD NOTES FOR NEW NOTES

         Under   applicable   authorities,   the  Notes  should  be  treated  as
indebtedness  of GST USA for United States federal  income tax purposes.  In the
unlikely event the Notes are treated as equity,  distributions  received thereon
would first be taxable to the Holder as dividend income to the extent of the GST
USA's current and accumulated earnings and profits, and next would be treated as
a return of capital to the extent of the  Holder's  tax basis in the Note,  with
any remaining amount treated as gain from the sale of a Note. As a result, until
such time as GST USA has earnings and profits as  determined  for United  States
federal income tax purposes, distributions on any Note treated as equity will be
a  nontaxable  return of  capital  and will be  applied  against  and reduce the
adjusted tax basis of such Note in the hands of its Holder (but not below zero).
Further,  payments on the Notes treated as equity to Non-U.S.  Holders would not
be eligible for the portfolio  interest exception from United States withholding
tax, and dividends thereon would be subject to United States  withholding tax at
a flat rate of 30% (or lower applicable treaty rate) and gain from their sale or
other  taxable  disposition  might  also be  subject to United  States  tax.  In
addition,  in the event of equity treatment,  GST USA would never be entitled to
deduct  interest  or  original  issue  discount  on the Notes for United  States
federal income tax purposes.  The remainder of this discussion  assumes that the
Notes will constitute indebtedness of GST USA for such tax purposes.

         In general,  an exchange of outstanding bonds such as the Old Notes for
newly  issued  bonds such as the New Notes is treated as tax free to  exchanging
creditors  and the debtor.  In this case,  a Holder's  basis in the New Notes is
generally the same as his basis in the Old Notes and the Holder's holding period
in the New Notes  includes  the  period  for which the Old Notes had been  held.
Although no gain or loss would be recognized to an exchanging

                                      -56-
<PAGE>
Holder under these  circumstances,  if the exchange of the Old Notes for the New
Notes were deemed to constitute an exchange of a debt  instrument for a modified
debt  instrument  that differed  materially in kind or in extent,  and the issue
price of the New Notes (which would be their  publicly-traded  fair market value
on the date on which a  substantial  amount of the New Notes is issued) was less
than that of the Old Notes,  additional original issue discount could arise to a
Holder.

         However,  for purposes of the original issue discount provisions of the
Code, the exchange of the New Notes for the Old Notes is likely to be considered
a retention  by the Holder of the Old Notes in  modified  form.  Under  Proposed
Regulations,  a  "significant  modification"  of a debt  instrument is deemed to
result in an exchange of the original instrument for a modified instrument, and,
conversely, a modification that is not a "significant  modification" is not such
an exchange.  The term  "modification" is defined as any alteration in any legal
right  or  obligation  of the  issuer  or  holder  of a debt  instrument,  and a
modification  is  "significant"  if it  either  falls  within  any  one of  four
categories  set  forth  in  the  Proposed  Regulations  or is  determined  to be
significant based on the facts and circumstances. Nevertheless, any modification
of a debt  instrument  that arises as a result of the  original  terms of a debt
instrument,  where the modified  instrument  continues to represent debt (rather
that equity),  is not treated as giving rise to a "modification" of the debt and
hence does not give rise to an exchange.  Inasmuch as the original  terms of the
Old Notes  contemplated  their  registration,  it appears  likely,  based on the
provisions of the Proposed Regulations, that the exchange by a Holder of the New
Notes for the Old Notes should not be deemed a  modification  and  therefore not
constitute an exchange of the Old Notes. Hence, the discussion that follows will
be based upon the terms and  circumstances  relating to the issuance  (including
the original issue discount treatment) of the Old Notes.  However,  there can be
no assurance  that the Proposed  Regulations  will be adopted in their  proposed
form, nor is there any outstanding  judicial authority at present concerning the
above-described original issue discount provisions of the Code.

APPLICABLE HIGH YIELD DISCOUNT AND EARNING STRIPPING RULES

         Generally, under Section 163(e)(5) of the Code, original issue discount
is not  deductible  until paid in cash or  property  (other  than issuer debt or
stock)  with  respect  to  any  "applicable  high  yield  discount  obligations"
("AHYDOs")  issued by a corporation.  A Note will constitute an AHYDO because it
(i) has a  maturity  date that is more than five  years  from the date of issue,
(ii) has a yield to maturity that equals or exceeds five percentage  points over
the  "applicable  federal  rate"  ("AFR")  for the  calendar  month in which the
obligation  is issued  and  (iii) has  "significant  original  issue  discount."
Inasmuch as the Notes are AHYDOs,  (i) the product of the total  original  issue
discount  under  the Notes  times  the  ratio of (a) the  excess of the yield to
maturity over the sum of the AFR plus six percentage  points to (b) the yield to
maturity will not be deductible by GST USA and will be treated for some purposes
as  dividends  to the Holders (to the extent that such  amounts  would have been
treated as  dividends if they had been  distributions  with respect to GST USA's
stock),  and (ii) any original issue discount for which GST USA's deductions are
not  disallowed  under clause (i) above will not be  deductible by GST USA until
paid.  Amounts treated as dividends under clause (i) will be  non-deductible  by
GST USA, and may qualify for the  dividends  received  deduction  for  corporate
holders,  but should be treated as original  issue discount and not as dividends
for United States withholding tax purposes.

         Further,  under Section 163(j) of the Code, no deduction is allowed for
"disqualified  interest" paid or accrued by a corporation  during a taxable year
if (i) such  corporation has "excess  interest  expense" (as defined by the Code
generally to mean the excess of any of the  corporation's  net interest  expense
over 50% of the "adjusted  taxable income" of the  corporation)  for the taxable
year, and (ii) the ratio of debt to equity of such corporation exceeds 1.5 to 1.
"Disqualified  interest"  includes any interest paid or accrued by a corporation
with respect to debt that is guaranteed  by a foreign  person that is related to
such  corporation to the extent that no gross basis United States tax is imposed
with respect to such interest. GST USA expects that 163(j) of the Code may apply
to limit the  deductibility  of interest paid or accrued by GST USA with respect
to the Notes.

TAX CONSEQUENCES TO U.S. HOLDERS OF OWNERSHIP AND DISPOSITION OF THE NOTES

         ORIGINAL  ISSUE  DISCOUNT.  The amount of original  issue discount on a
debt  instrument,  within the meaning of Section 1273 of the Code, is the excess
of its "stated  redemption price at maturity" over its issue price (as described
above).  The "stated  redemption  price at maturity" of a debt instrument is the
sum of its principal amount

                                      -57-
<PAGE>
plus all other payments required  thereunder,  other than payments of "qualified
stated interest"  (defined  generally as stated interest that is unconditionally
payable in cash or in property (other than the debt  instruments of the issuer),
at least annually at a single fixed rate that  appropriately  takes into account
the length of  intervals  between  payments).  As  interest  on the Notes is not
payable until June 2001, the stated interest on the Notes will not be treated as
qualified stated interest,  but will be added to the stated  redemption price at
maturity of the Notes. In addition,  the Notes will be issued at a price that is
less than their stated redemption price at maturity. As a result, the Notes will
be treated as having been  issued  with  original  issue  discount  equal to the
excess of their stated redemption price at maturity over their issue price.

         Each U.S. Holder of a Note (regardless of whether such U.S. Holder is a
cash or an accrual basis  taxpayer)  will be required to include  original issue
discount in such U.S.  Holder's gross income  periodically over the term of such
Note even though actual  payment of cash or other  property with respect to such
income is not received until a later date. In general, under Section 1272 of the
Code, the amount of original  issue discount that a holder of a debt  instrument
must include in gross income for United States  federal income tax purposes will
be the sum of the daily portions of original issue discount with respect to such
debt  instrument  for each day during the  taxable  year or portion of a taxable
year in which  such  holder  holds the debt  instrument.  The daily  portion  is
determined under a constant yield method by allocating to each day of an accrual
period (generally,  a six month period) a PRO RATA portion of an amount equal to
the  "adjusted  issue  price" of the debt  instrument  at the  beginning  of the
accrual period  multiplied by the yield to maturity of the debt instrument.  The
yield to maturity of a debt  instrument is the discount rate that,  when applied
to all payments due under the debt instrument, produces a present value equal to
the issue price of the debt instrument.  The "adjusted issue price" is the issue
price of the debt  instrument  increased by the accrued  original issue discount
for all prior accrual periods (and decreased by the amount of cash payments made
in all prior accrual periods, other than qualified stated interest payments).

         ACQUISITION  PREMIUM.  A Note  acquired  at a  cost  in  excess  of its
"adjusted  issue price" (as defined  above) but less than its stated  redemption
price at maturity will have an acquisition premium to the extent of such excess.
Under the  acquisition  premium  rules of the Code and the Treasury  Regulations
promulgated  thereunder,  the amount of the original  issue discount that a U.S.
Holder must  include in gross  income with  respect to such Note for any taxable
year  will  be  reduced  by the  portion  of the  acquisition  premium  properly
allocable to such taxable year.

         MARKET DISCOUNT.  Section 1276 of the Code generally  requires a holder
of a debt instrument with "market discount" to treat as ordinary income any gain
realized  on the  disposition  of the  instrument  to the extent of the  accrued
market  discount during the holder's  period of ownership.  A "market  discount"
bond is a debt  obligation  purchased  at a discount,  subject to a statutory DE
MINIMIS exception. For this purpose, a purchase of a debt instrument at a market
discount  includes (i) a purchase at original  issue at a price below its "issue
price," or (ii) in the case of a debt  instrument  issued  with  original  issue
discount,  a purchase at a price below the  adjusted  issue  price.  The accrued
market  discount  generally  equals  a  ratable  portion  of the  bond's  market
discount, based on the number of days that the taxpayer has held the bond at the
time of such  disposition,  as a percentage  of the number of days from the date
the taxpayer acquired the bond to its date of maturity.

         Absent an election to include market  discount in income as it accrues,
a holder of a market  discount bond generally is not required to include accrued
market  discount in income  until (i) such holder  receives a partial  principal
payment;  (ii) such holder sells or otherwise  disposes of such market  discount
bond; or (iii) such market discount bond is retired or redeemed by the issuer. A
U.S.  Holder who purchased a Note at a market discount and who does not elect to
include  market  discount  in income as it accrues  may be required to defer the
deduction  of all or a  portion  of the  interest  expense  on any  indebtedness
incurred or maintained by such holder to purchase or carry such Note.

         AMORTIZABLE BOND PREMIUM.  Generally, if the tax basis of an obligation
held  as a  capital  asset  exceeds  the  amount  payable  at  maturity  of  the
obligation,  such excess will  constitute  amortizable  bond premium that a U.S.
Holder may elect,  under Section 171 of the Code, to amortize under the constant
yield  method  over the period  from its  acquisition  date to the  obligation's
maturity  date. A Holder who elects to amortize bond premium must reduce its tax
basis in the  related  obligation  by the amount of the  aggregate  amortization
allowable for amortizable bond premium. Amortizable bond premium will be treated
under the Code as an offset to interest income on the related

                                      -58-
<PAGE>
debt  instrument for United States  federal income tax purposes,  subject to the
promulgation of Treasury Regulations altering such treatment.

         ELECTIONS. A U.S. Holder of Notes, subject to certain limitations,  may
elect to include all  interest  and discount on such Notes in gross income under
the constant  yield  method.  For this  purpose,  interest  includes  stated and
unstated interest,  acquisition  discount,  original issue discount,  DE MINIMIS
market discount and market discount, as adjusted by any amortizable bond premium
or  acquisition  premium.  Any such  election,  if made in  respect  of a market
discount bond,  will constitute an election to include market discount in income
currently on all market  discount bonds acquired by such U.S. Holder on or after
the first day of the first  taxable  year to which the  election  applies.  U.S.
Holders should consult with their tax advisors  regarding any tax elections they
intend to make with respect to any Notes.

         SALE OR OTHER  DISPOSITION.  In  general,  a U.S.  Holder of Notes will
recognize  gain or loss upon the sale,  exchange,  redemption,  or other taxable
disposition of such Notes  measured by the difference  between (i) the amount of
cash and the fair  market  value of  property  received  (except  to the  extent
attributable to accrued  interest on such Notes  previously  taken into account)
and (ii) the U.S.  Holder's tax basis in such Notes (as increased by any accrued
original  issue discount (net of all amortized  acquisition  premium) and market
discount  previously  included  in income by the U.S.  Holder and  decreased  by
amortizable bond premium, if any, deducted over the term of such Notes). Subject
to the  market  discount  rules  discussed  above,  any such  gain or loss  will
generally be long-term capital gain or loss,  provided such Notes have been held
for more than one year.

TAX CONSEQUENCES TO NON-U.S. HOLDERS OF OWNERSHIP AND DISPOSITION OF THE NOTES

         PORTFOLIO INTEREST EXEMPTION. A Non-U.S.  Holder will generally,  under
the portfolio  interest  exemption of the Code,  not be subject to United States
federal  income taxes and/or United States  withholding  tax, on original  issue
discount  on the Notes or  interest  paid on the  Notes,  provided  that (i) the
Non-U.S. Holder does not actually or constructively own 10% or more of the total
combined  voting power of all classes of stock of GST USA entitled to vote, (ii)
the  Non-U.S.  Holder is not (a) a bank  receiving  original  issue  discount or
interest pursuant to a loan agreement entered into in the ordinary course of its
trade or business or (b) a controlled foreign corporation that is related to GST
USA (actually or  constructively)  through stock ownership,  (iii) such original
issue  discount or interest is not  effectively  connected  with a United States
trade or  business  and  (iv)  either  (a) the  beneficial  owner  of the  Notes
certifies to GST USA or its agent, under penalties of perjury,  that it is not a
U.S.  Holder and  provides a  completed  IRS Form W-8  ("Certificate  of Foreign
Status") or (b) a  securities  clearing  organization,  bank or other  financial
institution that holds customers' securities in the ordinary course of its trade
or business (a "financial  institution")  and holds the Notes,  certifies to GST
USA or its agent, under penalties of perjury, that it has received Form W-8 from
the beneficial owner or that it has received from another financial  institution
a Form W-8 and furnishes the payor with a copy thereof. If any of the situations
described in proviso (i), (ii) or (iv) of the  preceding  sentence do not exist,
then an income tax treaty between the United States and the country of which the
Non-U.S.  Holder is a tax resident may provide for the  elimination or reduction
in the rate of United States withholding tax (which is currently 30%).

         In the unlikely event that the Notes were to be treated as equity,  the
periodic  distributions  received  by a Non-U.S.  Holder on the Notes  would not
qualify for the portfolio  interest  exemption from United States federal income
tax.  In  such a  case,  the  periodic  distributions  would  be  classified  as
dividends.  Generally,  cash dividends  that are paid to a Non-U.S.  Holder by a
United States  corporation  that are not  effectively  connected with a trade or
business carried on by such Non-U.S.  Holder in the United States are subject to
a 30% United States withholding tax. Under Treasury Regulations, the withholding
agent will be required to withhold tax from all distributions  paid on the stock
regardless of the company's earnings and profits, but Non-U.S. Holders may apply
for refunds if such stock's share of the company's  earnings and profits is less
than the amount of the distributions.  The rate of withholding may be reduced to
the extent provided by a tax treaty between the United States and the country of
which the non-U.S. Holder is a tax resident.

         SALE OF NOTES.  A  Non-U.S.  Holder  will  generally  not be subject to
United States  federal  income tax on any gain  realized in connection  with the
sale,  exchange or  redemption  of the Notes unless (i) the gain is  effectively
connected with a trade or business carried on by the Non-U.S.  Holder within the
United States or, if a treaty

                                      -59-
<PAGE>
applies,  the gain is  generally  attributable  to the United  States  permanent
establishment  maintained by the Non-U.S. Holder, or (ii) the Non-U.S. Holder is
an  individual  who is present in the United  States for 183 days or more in the
taxable year of disposition and certain other conditions are satisfied.

BACKUP WITHHOLDING

         In  general,  certain  payments  to  a  non-corporate  U.S.  Holder  of
principal and interest  (including original issue discount) on the Notes and the
gross  proceeds of a  disposition  of the Notes will be subject to United States
information reporting requirements.  In general,  subject to certain exceptions,
such  payments will be subject to United States  "backup  withholding"  tax at a
rate of 31% if the U.S. Holder does not provide a taxpayer identification number
or otherwise establish an exemption.

         In general,  any such payments to a Non-U.S.  Holder that are made to a
United  States  office of a custodian  or broker or that are  otherwise  paid or
considered  to be paid in the United  States  will be  subject to United  States
information  reporting  requirements and, under certain other circumstances,  to
United States backup withholding tax at a rate of 31% unless the Non-U.S. Holder
certifies  its  non-U.S.   status  under   penalties  of  perjury  or  otherwise
establishes  an  exemption.   Information  reporting   requirements  and  backup
withholding  tax will also apply to a payment of the  proceeds  of a sale of the
Notes by a paying  agent  within  the  United  States to a Holder  other  than a
Non-U.S. Holder providing an appropriate  certification and certain other exempt
recipients.  Information  reporting  requirements will apply to a payment of the
proceeds  of a sale of the Notes by a foreign  office of a broker  that (i) is a
U.S. person, (ii) is a U.S. controlled foreign corporation or (iii) is a foreign
person that derives at least 50% of its gross income from the conduct of a trade
or  business  within  the  United  States,  in each case  unless  the broker has
documentary  evidence  in its records  that the Holder is a Non-U.S.  Holder and
certain other conditions are met, or the Non-U.S.  Holder otherwise  establishes
an exemption.

         The amount of any backup withholding from a payment to a Holder will be
allowed as a credit  against such  Holder's  United  States  federal  income tax
liability  and may entitle such Holder to a refund,  provided  that the required
information is furnished to the Service.

                              PLAN OF DISTRIBUTION

         Except as described below,  (i) a broker-dealer  may not participate in
the Exchange Offer in connection with a distribution of the New Notes, (ii) such
broker-dealer   would  be  deemed  an  underwriter   in  connection   with  such
distribution and (iii) such  broker-dealer  would be required to comply with the
registration  and  prospectus  delivery  requirements  of the  Securities Act in
connection with any secondary resale transactions. A broker-dealer may, however,
receive New Notes for its own account pursuant to the Exchange Offer in exchange
for Old Notes when such Old Notes  were  acquired  as a result of  market-making
activities or other trading activities. Each such broker-dealer must acknowledge
that it will  deliver a  prospectus  in  connection  with any resale of such New
Notes. This Prospectus,  as it may be amended or supplemented from time to time,
may be used by a  broker-dealer  (other than an  "affiliate"  of the Company) in
connection with resales of such New Notes.  GST USA has agreed that for a period
of 180 days after the Expiration Date, it will make this Prospectus,  as amended
or supplemented,  available to any such broker-dealer for use in connection with
any such resale.

         GST USA will not  receive  any  proceeds  from any sale of New Notes by
broker-dealers.  New Notes  received  by  broker-dealers  for their own  account
pursuant  to the  Exchange  Offer  may be sold  from time to time in one or more
transactions in the over-the-counter market, in negotiated transactions, through
the  writing  of options on the New Notes or a  combination  of such  methods of
resale,  at market prices prevailing at the time of resale, at prices related to
such prevailing market prices or negotiated  prices. Any such resale may be made
directly  to  purchasers  or to or through  brokers or dealers  who may  receive
compensation   in  the  form  of  commissions  or  concessions   from  any  such
broker-dealer  and/or the  purchasers of any such New Notes.  Any  broker-dealer
that resells New Notes that were received by it for its own account  pursuant to
the Exchange  Offer may be deemed to be an  "underwriter"  within the meaning of
the  Securities  Act and any  profit  on any such  resale  of New  Notes and any
commissions  or  concessions  received  by any such  persons may be deemed to be
underwriting  compensation  under the Securities  Act. The Letter of Transmittal
states that by acknowledging that it will deliver and by

                                      -60-
<PAGE>
delivering a prospectus,  a broker-dealer will not be deemed to admit that it is
an "underwriter" within the meaning of the Securities Act.

         For a period  of 180  days  after  the  Expiration  Date,  GST USA will
promptly  send  additional  copies  of  this  Prospectus  and any  amendment  or
supplement to this Prospectus to any broker-dealer  that requests such documents
in a Letter of Transmittal.  GST USA has agreed to pay all expenses  incident to
the  Exchange  Offer other than  commissions  or  concessions  of any brokers or
dealers  and  transfer  taxes and will  indemnify  the  Holders of the Old Notes
(including  any   broker-dealers)   against   certain   liabilities,   including
liabilities under the Securities Act.

         MS&Co.  has  indicated to GST USA that it intends to effect  offers and
sales of the New  Notes  in  market-making  transactions  at  negotiated  prices
related to prevailing market prices at the time of sale, but is not obligated to
do so and such market-making  activities may be discontinued at any time. MS&Co.
may act as  principal or agent in such  transactions.  There can be no assurance
that an active market for the New Notes will develop.

                                  LEGAL MATTERS

         Certain  legal  matters  in  connection  with the  Notes  and the Notes
Guarantee  are being  passed  upon for the  Company by Olshan  Grundman  Frome &
Rosenzweig LLP, New York, New York, counsel to the Company.  Stephen Irwin, Esq.
is of counsel  to Olshan  Grundman  Frome &  Rosenzweig  LLP.  Mr.  Irwin,  Vice
Chairman of the Board and  Secretary  of GST,  owns 54,545  Common  Shares,  and
options and  warrants to purchase  415,000  Common  Shares.  Certain  regulatory
matters are being  passed  upon for the Company by Swidler & Berlin,  Chartered,
Washington  D.C.  Certain  Canadian  legal matters are being passed upon for the
Company by O'Neill & Company, Vancouver, British Columbia.

                                     EXPERTS

   
         The consolidated balance sheet of GST Telecommunications,  Inc. and its
subsidiaries  as of  September  30,  1995  and the  consolidated  statements  of
operations  and deficit and cash flows for the year ended  September  30,  1995,
have been  incorporated by reference  herein in reliance upon the report of KPMG
Peat Marwick LLP, independent  auditors,  and upon the authority of said firm as
experts in  accounting  and  auditing.  The  consolidated  balance  sheet of GST
Telecommunications,  Inc. and its  subsidiaries as of September 30, 1994 and the
consolidated  statements  of  operations  and  deficit and cash flows for the 13
months  ended  September  30,  1994 and year  ended  August  31,  1993 have been
incorporated  by  reference  herein  in  reliance  upon the  report of KPMG Peat
Marwick Thorne,  independent chartered  accountants,  upon the authority of said
firm as experts in accounting and auditing.  The audited financial statements of
International  Telemanagement  Group,  Inc. as of December 31, 1994 and 1993 and
for the year ended  December  31, 1994 and the period  January 23, 1993 (date of
inception)  through December 31, 1993 have been included herein in reliance upon
the  report  of  KPMG  Peat  Marwick  LLP,  independent  certified  accountants,
incorporated by reference herein, and upon the authority of said firm as experts
in accounting and auditing.  The financial statements of the  IntelCom-Greenstar
Joint  Venture  for the  periods  ended  September  30,  1994 and 1993 have been
incorporated  by  reference  herein upon  reliance  upon the report of KPMG Peat
Marwick Thorne,  independent  chartered  accountants,  and upon the authority of
said firm as experts in accounting and auditing.
    

                                      -61-
<PAGE>
                          INDEX TO FINANCIAL STATEMENTS
                                                                        Page(s)

INTERNATIONAL TELEMANAGEMENT GROUP, INC.

Independent Auditors' Report..............................................F-2

Balance Sheets at December 31, 1994 and 1993 .............................F-3

Statements of Operations for the four months 
ended April 30, 1995, the year
ended December 31, 1994 and for the period 
January 23, 1993 (date of inception)
through December 31, 1993 ................................................F-4

Statements of Stockholders' Deficit for 
the four months ended April 30, 1995,
the year ended December 31, 1994 and for 
the period January 23, 1993 (date of
inception) through December 31, 1993......................................F-5

Statements of Cash Flows for the four 
months ended April 30, 1995, the year ended
December 31, 1994 and for the period 
January 23, 1993 (date of inception)
through December 31, 1993.................................................F-6

Notes to Financial Statements.............................................F-7



GST TELECOMMUNICATIONS, INC.

Description of Unaudited Pro Forma Financial Statements
  Reflecting the Acquisition of International Management
  Group, Inc. (ITG) By GST Telecommunications, Inc. (GTI)................F-11

   
Pro Forma Statement of Operations for
  the twelve months ended September 30, 1995.............................F-12

Notes to Pro Forma Statement
  of Operations for the twelve months ended September 30, 1995...........F-13
    






                                       F-1
<PAGE>
                          INDEPENDENT AUDITORS' REPORT



The Board of Directors
International Telemanagement Group, Inc.:

We have audited the accompanying balance sheets of International Telemanagement
Group, Inc. (the Company), as of December 31, 1994 and 1993, and the related
statements of operations, stockholders' deficit, and cash flows for the year
ended December 31, 1994, and for the period January 23, 1993 (date of inception)
through December 31 1993. These financial statements are the responsibility of
the Company's management. Our responsibility is to express an opinion on these
financial statements based on our audits.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the financial position of International Telemanagement
Group, Inc., as of December 31, 1994 and 1993, and the results of its operations
and its cash flows for the year ended December 31, 1994 and for the period
January 23, 1993 (date of inception) through December 31, 1993 in conformity
with generally accepted accounting principles.

As discussed in note 2, effective May 1, 1995, the Company was acquired by GST
Telecom, Inc.



                                   /S/ KPMG PEAT MARWICK LLP

Detroit, Michigan
July 21, 1995


                                      F-2
<PAGE>
                    INTERNATIONAL TELEMANAGEMENT GROUP, INC.
                                 Balance Sheets
                           December 31, 1994 and 1993
<TABLE>
<CAPTION>
                                     Assets                                             1994               1993
                                     ------                                             ----               ----
<S>                                                                                  <C>                   <C>      
Current assets:
    Cash                                                                            $     702,392             71,309
    Trade accounts receivable, less allowance for doubtful accounts of $164,000
       and $52,000, at 1994 and 1993, respectively                                      1,167,346            370,643
    Due from officers and employees                                                         -                 48,690
    Other receivables                                                                       9,152              5,000
    Prepaid expenses and other current assets                                              80,713            115,805
                                                                                     ------------       ------------

                   Total current assets                                                 1,959,603            611,447

Property and equipment, net (note 3)                                                    1,318,870          1,175,495
                                                                                        ---------          ---------

                                                                                     $  3,278,473          1,786,942
                                                                                     ============          =========

                     Liabilities and Stockholders' Deficit
                     -------------------------------------

Current liabilities:
    Current installments of notes payable to related parties (note 5)                $    368,380             95,520
    Current installments of long-term debt (note 4)                                        98,185              -
    Current installments of capital lease obligations (note 7)                            175,668            144,897
    Accounts payable and accrued line charges, net                                      3,735,260          1,107,141
    Due to affiliates                                                                       -                  4,417
    Other accrued expenses and liabilities                                                157,789             22,049
    Deferred revenues                                                                      23,982             22,363
                                                                                     ------------       ------------

                   Total current liabilities                                            4,559,264          1,396,387
                                                                                        ---------          ---------

Notes payable to related parties, less current installments (note 5)                      246,040              -
Long-term debt, less current installments (note 4)                                        131,945              -
Capital lease obligations, less current installments (note 7)                             747,227            890,913
                                                                                     ------------       ------------

                   Total liabilities                                                    5,684,476          2,287,300
                                                                                        ---------          ---------

Commitments and contingencies (notes 7, 9, and 10)

Stockholders' deficit:
    Common stock, no par value, 750 shares authorized, 200 issued and
       outstanding                                                                          1,000              1,000
    Additional paid-in capital                                                            598,630            332,678
    Accumulated deficit                                                                (2,973,765)          (834,036)
                                                                                        ---------       ------------

                                                                                       (2,374,135)          (500,358)

    Less: Treasury stock, at cost of 88 shares                                            (31,868)                -
                                                                                     ------------       -----------

                   Net stockholders' deficit                                           (2,406,003)          (500,358)
                                                                                        ---------       ------------

                                                                                     $  3,278,473         1,786,942
                                                                                     ============         =========
</TABLE>
See accompanying notes to financial statements.

                                      F-3
<PAGE>
                    INTERNATIONAL TELEMANAGEMENT GROUP, INC.
                            Statements of Operations
<TABLE>
<CAPTION>
                                                                                                     For the Period
                                                                                                       January 23,
                                                                                                          1993
                                                                                                        (Date of
                                                             Four Months           Year Ended     Inception) through
                                                        Ended April 30, 1995      December 31,        December 31,
                                                             (Unaudited)              1994                1993
                                                        --------------------      ------------    -------------------
                                                                                  
<S>                                                      <C>                         <C>                  <C>      
Net sales and services                                   $      5,010,908            12,202,063           1,494,943
Cost of goods and services                                      4,766,433            11,788,135           1,735,717
                                                                ---------            ----------           ---------

                   Gross profit (loss)                            244,475               413,928            (240,774)

Selling, general, and administrative expenses                     988,203             2,014,635             507,824
                                                             ------------        --------------        ------------

Loss from operations                                             (743,728)           (1,600,707)           (748,598)

Other income (expense):
    Interest expense                                              (53,373)             (140,338)            (16,503)
    Other expense, net                                                 -               (398,684)            (68,935)
                                                             ------------        --------------        ------------

                   Net loss                              $       (797,101)           (2,139,729)           (834,036)
                                                             ============            ==========        ============
</TABLE>

See accompanying notes to financial statements.

                                      F-4

<PAGE>
                    INTERNATIONAL TELEMANAGEMENT GROUP, INC.
                       Statements of Stockholders' Deficit
<TABLE>
<CAPTION>
                                                       For the Period January 23, 1993 (Date of Inception)
                                                                     Through December 31, 1993
                                     --------------------------------------------------------------------------------------------
                                                          Additional
                                        Common             Paid-in          Accumulated          Treasury         Stockholders'
                                         Stock             Capital            Deficit              Stock             Deficit
                                         -----             -------            -------              -----             -------
<S>                                  <C>                      <C>                <C>                                    <C>      
Balances at inception                $      -                     -                 -                -                     -
Issuance of common stock                 1,000                332,678               -                -                 332,678
Net loss                                    -                      -           (834,036)             -                (834,036)
                                        ------             ----------           -------              -                 -------

Balances at end of period            $   1,000                332,678          (834,036)             -                (500,358)
                                         =====                =======           =======              =                 =======

                                                                   Year Ended December 31, 1994
                                     --------------------------------------------------------------------------------------------
                                                          Additional
                                        Common             Paid-in          Accumulated          Treasury         Stockholders'
                                         Stock             Capital            Deficit              Stock             Deficit
                                         -----             -------            -------              -----             -------

Balances at beginning of period      $   1,000                332,678            (834,036)             -                (500,358)
Capital contributions                      -                  272,000               -                  -                 272,000
Distributions to shareholder               -                   (6,048)              -                  -                  (6,048)
Repurchase of shares                       -                      -                 -              (31,868)              (31,868)
Net loss                                    -                      -           (2,139,729)              -             (2,139,729)
                                        ------             ----------           ---------        ---------             ---------

Balances at end of period            $   1,000                598,630          (2,973,765)         (31,868)           (2,406,003)
                                         =====                =======           =========           ======             =========

                                                           Four Months Ended April 30, 1995 (Unaudited)
                                     --------------------------------------------------------------------------------------------
                                                          Additional
                                        Common             Paid-in          Accumulated          Treasury         Stockholders'
                                         Stock             Capital            Deficit              Stock             Deficit
                                         -----             -------            -------              -----             -------

Balances at beginning of period      $   1,000                598,630          (2,973,765)         (31,868)           (2,406,003)
Capital contributions                      -                   10,600               -                  -                  10,600
Repurchase of shares                       -                      -                 -               (2,050)               (2,050)
Net loss                                    -                      -             (797,101)              -               (797,101)
                                        ------             ----------        ------------        ---------          ------------

Balances at end of period            $   1,000                609,230          (3,770,866)         (33,918)           (3,194,554)
                                         =====                =======           =========           ======             =========
</TABLE>
See accompanying notes to financial statements.

                                      F-5
<PAGE>
                    INTERNATIONAL TELEMANAGEMENT GROUP, INC.
                            Statements of Cash Flows

<TABLE>
<CAPTION>
                                                                                                                     For the Period
                                                                                                                       January 23,
                                                                                                                      1993 (Date of
                                                                                 Four Months                             Inception)
                                                                                Ended April 30,      Year Ended          through
                                                                                    1995            December 31,        December 31,
                                                                                 (Unaudited)            1994               1993
                                                                                 -----------            ----               ----
<S>                                                                             <C>                  <C>                <C>
Cash flows from operating activities:
   Net loss                                                                      $ (797,101)         (2,139,729)           (834,036)
   Adjustments to reconcile net loss to net cash
      provided by (used in) operating activities:
   Depreciation and amortization                                                    114,773             318,926              57,859
   Changes in assets and liabilities:
      Trade accounts receivable                                                    (165,145)           (796,703)           (370,643)
      Due from officers and employees                                                  --                48,690             (48,690)
      Other receivables                                                               6,652              (4,152)             (5,000)
      Prepaid expenses and other current assets                                     (13,000)             35,092            (115,805)
      Accounts payable and accrued line charges                                     912,626           2,808,920           1,107,141
      Due to affiliates                                                                --                (4,417)              4,417
      Other accrued expenses and liabilities                                         35,127             135,740              22,049
      Deferred revenues                                                              92,129               1,619              22,363
                                                                                 ----------          ----------          ----------

         Net cash provided by (used in) operating
           activities                                                               186,061             403,986            (160,345)
                                                                                 ----------          ----------          ----------

Cash flows from investing activities - capital                                      (60,550)           (462,301)         (1,233,354)
   expenditures for property and equipment                                             --                  --                  --


         Net cash used in investing activities                                      (60,550)           (462,301)         (1,233,354)
                                                                                 ----------          ----------          ----------

Cash flows from financing activities:
   Repayment of long-term debt                                                     (369,121)             49,329
   Net borrowings on revolving note payable to related
      parties                                                                          --               265,000              95,520
   Net repayments on notes payable to officers and
      employees                                                                        --               253,900                --
   Repurchase of treasury stock                                                      (2,050)            (31,868)               --
   Payments made under capital leases                                                  --              (112,915)          1,035,810
   Additional paid in capital                                                        10,600             272,000                --
   Distributions to shareholder                                                        --                (6,048)               --
   Proceeds from stock issuance                                                        --                  --               333,678
                                                                                 ----------          ----------          ----------

         Net cash provided by financing activities                                 (360,571)            689,398           1,465,008
                                                                                 ----------          ----------          ----------

Net increase (decrease) in cash                                                    (235,060)            631,083              71,309

Cash at beginning of year                                                           702,392              71,309                --
                                                                                 ----------          ----------          ----------

Cash at end of year                                                              $  467,322             702,392              71,309
                                                                                 ==========          ==========          ==========

Supplemental disclosures of cash flow information -
   cash paid during the year for interest                                        $   44,025             132,073               9,513
                                                                                 ==========          ==========          ==========
</TABLE>
See accompanying notes to financial statements.

                                       F-6
<PAGE>
                    INTERNATIONAL TELEMANAGEMENT GROUP, INC.
                          Notes to Financial Statements
                           December 31, 1994 and 1993



(1)  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     International  Telemanagement  Group, Inc. (the Company), is a domestic and
     international  interexchange  carrier offering long distance,  800, private
     line, and other services to its customers.  ITG was incorporated in January
     1993 under the laws of the state of Ohio.

     (a)  PROPERTY AND EQUIPMENT

          Property and  equipment are stated at cost.  Depreciation  of property
          and equipment is provided  principally on a  straight-line  basis over
          the  estimated  useful lives of the related  assets.  Assets  recorded
          under capital leases are amortized over the terms of the leases.

     (b)  INCOME TAXES

          The  stockholders  of the Company  have  elected to be treated as an S
          corporation, whereby taxable income and/or losses are allocated to the
          stockholder rather than to the Company.  Accordingly, the accompanying
          financial  statements do not include  provisions for federal and state
          taxes on income earned by the Company.

     (c)  REVENUE RECOGNITION

          Income from  services is  recognized  when the  contracted  service is
          rendered.

     (d)  GENERAL CREDIT RISK

          The Company grants credit to customers on open account,  substantially
          all of whom are in the telecommunications industry.

(2)    SUBSEQUENT EVENT

       On May 1, 1995, the Company entered into a purchase agreement with GST
       Telecom, Inc. (GST Net), in which all outstanding stock of the Company
       was sold for cash. GST Net has indicated its intention to fully fund the
       operations of the Company and maintain the Company operations principally
       in the lines of business in which it currently operates.

(3)    PROPERTY AND EQUIPMENT

<TABLE>
<CAPTION>
       Property and equipment at December 31, 1994 and 1993, consisted of:
                                                                                    1994                1993
                                                                                    ----                ----
<S>                                                                              <C>                 
         Leasehold improvements                                                  $      6,243              6,243
         Machinery and equipment                                                    1,689,412          1,227,111
                                                                                    ---------          ---------

                                                                                    1,695,655          1,233,354

         Less accumulated depreciation and amortization                              (376,785)           (57,859)
                                                                                 ------------       ------------

                            Property and equipment, net                           $ 1,318,870         1,175,495
                                                                                  ===========         =========
</TABLE>

                                      F-7
<PAGE>

                    INTERNATIONAL TELEMANAGEMENT GROUP, INC.
                    Notes to Financial Statements, Continued



(4)    LONG-TERM DEBT
<TABLE>
<CAPTION>
       Long-term debt at December 31, 1994 and 1993, consists of the following:
                                                                                    1994                1993
                                                                                    ----                ----
<S>                                                                           <C>                        <C>
       Note payable to customer, 0% interest, monthly payments of $6,944,     $      215,278             -
       Note payable to supplier, 7% interest, monthly payments of $14,939,
           including interest, due February 1995                                      14,852             -
                                                                                  ----------             -

                          Total long-term debt                                       230,130             -

       Less current installments                                                     (98,185)            -
                                                                                  ----------             -

                          Long-term debt, less current installments           $      131,945             -
                                                                                     =======             =
</TABLE>
     In addition,  the Company has incurred borrowings from related parties (see
     note 5).

       As of December 31, 1994, the maturities of long-term debt are as follows:

                                       Year Ended
                                      December 31,
                                      ------------

                                          1995            $     98,185
                                          1996                  83,333
                                          1997                  48,612
                                                          ------------

                                                          $    230,130
                                                          ============

(5)    RELATED PARTY TRANSACTIONS

       The Company has entered into numerous transactions with its principal
       stockholder and other related entities controlled by its stockholders.


                                      F-8
<PAGE>
                    INTERNATIONAL TELEMANAGEMENT GROUP, INC.
                    Notes to Financial Statements, Continued



(5)  RELATED PARTY TRANSACTIONS, CONTINUED

     The  Company's   principal   stockholder  or  entities  controlled  by  the
     stockholder have obtained financing from two financial institutions.  These
     funds were, in turn, loaned to the Company. The unwritten agreement between
     the  Company  and the  related  parties is that the  Company  will make all
     necessary payments under the stated bank terms. The terms are as follows:
<TABLE>
<CAPTION>
                                                                                    1994                1993
                                                                                    ----                ----

<S>                                                                              <C>                     <C>
       Note payable, bearing interest at 8.25%, payable in monthly
           installments of $8,615, due in full September 1997                    $   349,420             95,520
       Note payable, bearing interest at 1% over the prime rate, due in
           full December 12, 1994.  On March 9, 1995, the loan was renewed
           by the bank                                                               265,000                 -
                                                                                     -------          --------

                          Total notes payable related parties                        614,420             95,520

       Less current installments                                                     368,380             95,520
                                                                                     -------             ------

                          Notes payable to related parties, less current
                             installments                                        $   246,040                 -
                                                                                     =======          ========
</TABLE>
       The Company rents office space and telecommunications equipment from
       related parties on a month-to-month basis. Rental expense for the periods
       ended December 31, 1994 and 1993, totaled $248,572 and $96,057,
       respectively.

(6)  COMMON STOCK

     During 1994, the Company repurchased common shares from its stockholders at
     a cost of $31,868.

(7)  LEASES

     The Company leases  telecommunications and computer equipment under capital
     leases.  Additionally,  certain  communications  equipment  is leased under
     operating leases.  Lease terms include  per-minute  charges and minimum fee
     levels.


                                      F-9
<PAGE>
                    INTERNATIONAL TELEMANAGEMENT GROUP, INC.
                    Notes to Financial Statements, Continued



(7)  LEASES, CONTINUED

     Future  minimum lease  payments  under capital and operating  leases are as
     follows:
<TABLE>
<CAPTION>
                                                             1994                                1993
                                                 ---------------------------         --------------------------
                                                  Capital          Operating         Capital          Operating
                                                  Leases            Leases            Leases           Leases
                                                  ------            ------            ------           ------
<S>                                          <C>                   <C>               <C>            <C>
       Year ending December 31:
           1994                              $            -             -               196,988         23,924
           1995                                      261,464        143,544             283,555        143,544
           1996                                      283,555        143,544             283,555        143,544
           1997                                      276,751        143,544             283,555        143,544
           1998                                      268,714        119,620             276,650        119,620
           1999                                       44,183             -               44,183             -
                                                ------------      ---------       -------------      --------

                Total lease payments               1,134,667        550,252           1,368,486        574,176
                                                                    =======                            =======

       Less amount representing interest
                                                    (211,772)                          (332,676)
                                                ------------                      -------------

                Total obligations under
                   capital leases                    922,895                          1,035,810

       Current installments of capital
           lease obligations                         175,668                            144,897
                                                 -----------                      -------------

                Capital lease obligations,
                   less current installments     $  747,227                             890,913
                                                 ==========                             =======
                                                     
</TABLE>
     Total rental expense under operating  leases for the periods ended December
     31, 1994 and 1993, totaled $23,900 and $4,500, respectively.

     The Company  also leases  certain  equipment  and office space from related
     parties (see note 5).

(8)  MAJOR CUSTOMERS

     Gross  revenues of  approximately  $3,000,000  were  derived from two major
     customers for the year ended December 31, 1994.

(9)  SERVICE CONTRACTS

     The Company has  entered  into  service  contracts  with  telecommunication
     providers  which  require a minimum  service  fee on a monthly  basis.  The
     Company has  committed  to minimum  revenues  of $350,000  per month by May
     1995, and must pay one-half of any shortfall.

(10) CONTINGENCIES

     The  Company  is a party to a number of  lawsuits  and claims  relating  to
     service  liability.  While  the  ultimate  results  of  lawsuits  or  other
     proceedings  against  the  Company  cannot  be  predicted  with  certainty,
     management does not expect that the settlement of these matters will have a
     material adverse effect on the financial position of the Company.



                                      F-10
<PAGE>
             DESCRIPTION OF UNAUDITED PRO FORMA FINANCIAL STATEMENTS
             REFLECTING THE ACQUISITION OF INTERNATIONAL MANAGEMENT (ITG)
             GROUP, INC. BY GST TELECOMMUNICATIONS, INC. (GTI)

     The following unaudited pro forma consolidated financial statements have
been prepared giving effect to the acquisition of ITG as if the transaction had
taken place as of October 1, 1994.

     On May 1, 1995, GTI acquired 100% of the outstanding stock of ITG for
consideration of $74,761, the assumption of certain liabilities and an earnout
provision. The acquisition has been accounted for using the purchase method. All
of the excess purchase price was allocated to goodwill as the net book value of
the assets acquired approximated fair market value at the time of the
acquistion.

     The unaudited pro forma financial information is not necessarily indicative
of the results of operations which would have been attained had the acquisition
been consummated at any of the foregoing assumed dates, or which may be attained
in the future. The pro forma financial information should be read in conjunction
with the historical financial statements of GTI and ITG.


                                      F-11
<PAGE>
GST TELECOMMUNICATIONS, INC.
PRO FORMA STATEMENT OF OPERATIONS
TWELVE MONTHS ENDED SEPTEMBER 30, 1995
(unaudited)
<TABLE>
<CAPTION>
                                                             Historical            
                                                    ----------------------------- Pro Forma          Pro Forma  
                                                         GTI            ITG       Adjustments           Total
                                                                        (A)
- -------------------------------------------------------------------------------------------------------------------
<S>                                               <C>                <C>               <C>            <C>   
Revenues:
           Product                                $      7,563,087             0                         7,563,087
           Telecommunication services                   11,118,373    11,403,482                        22,521,855
- -------------------------------------------------------------------------------------------------------------------
                                                        18,681,460    11,403,482                        30,084,942
- -------------------------------------------------------------------------------------------------------------------

Cost of goods sold/services:
           Product                                       3,095,679             0                         3,095,679
           Telecommunication services                   12,198,610    11,071,799                        23,270,409
- -------------------------------------------------------------------------------------------------------------------
                                                        15,294,289    11,071,799                        26,366,088
- -------------------------------------------------------------------------------------------------------------------

Gross margin                                             3,387,171       331,683                         3,718,854

Operating expenses
           General and administration                    8,880,162     2,348,523                        11,228,685
           Marketing,travel and promotion                2,493,159        30,373                         2,523,532
           Research and development                      1,270,590             0                         1,270,590
           Depreciation and amortization                 2,373,912       344,337        287,472 (B)      3,005,721
           --------------------------------------------------------------------------------------------------------

Loss from operations                                   (11,630,652)   (2,391,550)      (287,472)       (14,309,674)

Other income (expenses):
           Interest income                                 302,605             0                           302,605
           Interest expense                               (837,850)     (123,631)                         (961,481)
           Foreign exchange loss                            (7,365)            0                            (7,365)
           Loss from joint ventures                       (660,653)            0                          (660,653)
           Other non-op expense                           (679,205)     (258,036)                         (937,241)
- -------------------------------------------------------------------------------------------------------------------
                                                        (1,882,468)     (381,667)             0         (2,264,135)
- -------------------------------------------------------------------------------------------------------------------

Loss before income taxes
           and non-controlling interest                (13,513,120)   (2,773,217)      (287,472)       (16,573,809)

Income tax expense                                        (166,015)            0                          (166,015)
- -------------------------------------------------------------------------------------------------------------------

Loss before non-controlling interest
           in income of subsidiaries                   (13,679,135)   (2,773,217)      (287,472)       (16,739,824)

Non-controlling interest in loss of subsidiaries         2,364,431             0                         2,364,431
- -------------------------------------------------------------------------------------------------------------------

Loss for the period                                    (11,314,704)   (2,773,217)      (287,472)       (14,375,393)
                                                    ===============================================================

Loss per share                                               (0.82)                                          (1.04)
                                                    ===============================================================

Weighted average common and common
equivalent shares outstanding                           13,780,796                                      13,780,796
                                                    ===============================================================

</TABLE>

                                      F-12
<PAGE>
GST TELECOMMUNICATIONS, INC.
NOTES TO PRO FORMA STATEMENT OF OPERATIONS
TWELVE MONTHS ENDED SEPTEMBER 30, 1995

(A) The following is a computation of the purchase price:
    Cash paid in closing                                                    200
    Direct costs of acquisition-Legal fees                               74,561
                                                                     ----------
                                                                         74,761
                                                                     ==========

The purchase price is allocated as follows:
    Book value of nets assets acquired                                3,160,682
    Liabilities assumed                                              (6,918,875)
    Excess of cost over value assigned (goodwill)                     3,832,954
                                                                     ----------
                                                                         74,761
                                                                     ==========

(B) To amortize goodwill on a straight-line basis over 10 years         287,472
                                                                     ==========


                                      F-13
<PAGE>


                                     PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS


ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

         The expenses in connection  with the issuance and  distribution  of the
securities being registered,  all of which will be paid by the Registrants,  are
as follows:

SEC Registration Fee.....................................   $ 56,419.49
Accounting Fees and Expenses.............................     25,000.00
Legal Fees and Expenses..................................     40,000.00
Blue Sky Fees and Expenses...............................      2,000.00
Miscellaneous Expenses...................................      6,580.51
                                                            -----------
Total....................................................   $130,000.00
                                                            ===========

- -----------------


ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

GST USA

         The General  Corporation  Law of the State of Delaware  (the  "Delaware
Law") permits indemnification of directors, employees and agents of corporations
under certain  conditions  and subject to certain  limitations.  Pursuant to the
Delaware  Law,  GST USA has included in its  Certificate  of  Incorporation  and
bylaws a provision to  eliminate  the personal  liability of its  directors  for
monetary  damages  for  breach or  alleged  breach of their  duty of care to the
fullest  extent  permitted by the Delaware Law and to provide that GST USA shall
indemnify  its  directors  and officers to the fullest  extent  permitted by the
Delaware Law.

GST

         Except  as  hereinafter  set  forth,  there  is  no  statute,   charter
provision,  by-law,  contract or other  arrangement  under which any controlling
person,  director  or officer of GST is  insured  or  indemnified  in any manner
against liability which he may incur in his capacity as such.

               GST's  authority  to  indemnify  its  directors  and  officers is
governed by the  provisions of Section 124 of the Canada  Business  Corporations
Act, as follows:

               (1)  Indemnification.  Except  in  respect  of an action by or on
behalf of the  corporation or body corporate to procure a judgment in its favor,
a corporation may indemnify a director or officer of the  corporation,  a former
director  or  officer  of the  corporation  or a person who acts or acted at the
corporation's  request as a director or officer of a body corporate of which the
corporation  is or was a  shareholder  or  creditor,  and his  heirs  and  legal
representatives,  against all costs,  charges and expenses,  including an amount
paid to settle an action or satisfy a  judgment,  reasonably  incurred by him in
respect of any civil,  criminal or administrative  action or proceeding to which
he is made a party by reason of being or having  been a  director  or officer of
such corporation or body corporate, if

               (a)  he acted  honestly and in good faith with a view to the best
                    interests of the corporation; and

               (b)  in the  case  of a  criminal  or  administrative  action  or
                    proceeding  that is enforced by a monetary  penalty,  he had
                    reasonable  grounds  for  believing  that  his  conduct  was
                    lawful.

                                      II-1

<PAGE>

               (2) INDEMNIFICATION IN DERIVATIVE ACTIONS. A corporation may with
the  approval of a court  indemnify a person  referred to in  subsection  (1) in
respect of an action by or on behalf of the  corporation  or body  corporate  to
procure a judgment in its favor,  to which he is made a party by reason of being
or having been a director or an officer of the  corporation  or body  corporate,
against all costs, charges and expenses reasonably incurred by him in connection
with such action if he fulfills the conditions set out in paragraphs  (1)(a) and
(b).

               (3)  INDEMNITY  AS OF  RIGHT.  Notwithstanding  anything  in this
section,  a person  referred to in subsection  (1) is entitled to indemnity from
the  corporation  in respect  of all  costs,  charges  and  expenses  reasonably
incurred  by him in  connection  with the  defense  of any  civil,  criminal  or
administrative  action  or  proceeding  to which he is made a party by reason of
being or having been a director or officer of the corporation or body corporate,
if the person seeking indemnity

               (a)  was substantially successful on the merits in his defense of
                    the action or proceeding, and

               (b)  fulfills the  conditions  set out in  paragraphs  (1)(a) and
                    (b).

              (4) DIRECTORS' AND OFFICERS' INSURANCE. A corporation may purchase
and maintain  insurance for the benefit of any person referred to subsection (1)
against any liability incurred by him

               (a)  in his capacity as a director or officer of the corporation,
                    except  where the  liability  relates to his  failure to act
                    honestly and in good faith with a view to the best interests
                    of the corporation; or

               (b)  in his  capacity  as a director  or officer of another  body
                    corporate  where he acts or acted  in that  capacity  at the
                    corporation's request, except where the liability relates to
                    his failure to act honestly and in good faith with a view to
                    the best interests of the body corporate.

               (5)  APPLICATION TO COURT. A corporation or a person  referred to
in subsection (1) may apply to a court for an order approving an indemnity under
this  section  and the court may so order and make any  further  order it thinks
fit.

               (6) NOTICE TO DIRECTOR.  An applicant under  subsection (5) shall
give the  Director  notice of the  application  and the  Director is entitled to
appear and be heard in person or by counsel.

               (7) OTHER NOTICE.  On an application  under  subsection  (5), the
court may order notice to be given to any  interested  person and such person is
entitled to appear and be heard in person or by counsel.

               GST's by-laws  provide that every director and officer of GST and
his heirs,  executors,  administrators and other legal personal  representatives
shall be  indemnified  and held  harmless from and against (a) any liability and
all costs,  charges and  expenses  that he sanctions or incurs in respect of any
action,  suit or proceeding that is proposed or commenced  against him for or in
respect of anything  done or permitted by him in respect of the execution of the
duties of his office  and (b) all other  costs,  charges  and  expenses  that he
sustains or incurs in respect of the affairs of GST.

               GST  maintains a  $5,000,000  directors  and  officers  liability
insurance policy.


         GST has also agreed to indemnify  each director and  executive  officer
pursuant to an  indemnification  agreement with each such director and executive
officer  from and  against any and all  expenses,  losses,  claims,  damages and
liability  incurred by such director or executive  officer for or as a result of
action taken or not taken while such director or executive officer was acting in
his capacity as a director, officer, employee or agent of the Company.


                                      II-2

<PAGE>
ITEM 16. EXHIBITS.

         *1       Placement Agreement dated December 14, 1995, by and among GST,
                  GST USA, the Specified Subsidiaries named therein and Morgan
                  Stanley & Co. Incorporated (incorporated by reference to
                  Exhibit 2.2 to GST's Annual Report on Form 20-F for the fiscal
                  year ended September 30, 1995).

         *4       Senior Notes Indenture dated as of December 19, 1995, by and
                  among GST USA, GST and United States Trust Company of New York
                  (incorporated by reference to Exhibit 2.3 to GST's Annual
                  Report on Form 20-F for the fiscal year ended September 30,
                  1995).

         *5       Opinion of Olshan Grundman Frome & Rosenzweig LLP.

         *8       Opinion of Olshan Grundman Frome & Rosenzweig LLP (included in
                  Exhibit 5 to this Registration Statement).

        **23.1    Consent of KPMG Peat Marwick LLP.

        **23.2    Consent of KPMG Peat Marwick Thorne.

        **23.3    Consent of KPMG Peat Marwick LLP.

         *23.4    Consent of Olshan Grundman Frome & Rosenzweig LLP (included in
                  Exhibit 5 to this Registration Statement).

        **23.5    Consent of KPMG Peat Marwick Thorne.

         *25      Statement of eligibility of trustee.

         *99.1    Senior Notes Registration Rights Agreement dated December 19,
                  1995, by and among GST USA, GST, the Specified Subsidiaries
                  named therein and Morgan Stanley & Co. Incorporated
                  (incorporated by reference to Exhibit 25 to GST's Annual
                  Report on Form 20-F for the fiscal year ended September 30,
                  1995).

         *99.2    Letter of Transmittal for Tender of all outstanding 13-7/8%
                  Senior Discount Notes Due 2005 in exchange for 13-7/8% Senior
                  Discount Exchange Notes Due 2005 of GST USA, Inc.

         *99.3    Tender for all outstanding 13-7/8% Senior Discount Notes Due
                  2005 in exchange for 13- 7/8% Senior Discount Exchange Notes
                  Due 2005 of GST USA, Inc.

         *99.4    Instruction to Registered Holder from Beneficial Owner of
                  13-7/8% Senior Discount Notes due 2005 of GST USA, Inc.

         *99.5    Notice of Guaranteed Delivery for outstanding 13-7/8% Senior
                  Discount Notes Due 2005 in exchange for 13-7/8% Senior
                  Discount Exchange Notes Due 2005 of GST USA, Inc.

- -----------------
 *Previously filed
**Filed herewith

ITEM 17. UNDERTAKINGS.

         The undersigned  registrant hereby undertakes to deliver or cause to be
delivered with the prospectus, to each person to which the prospectus is sent or
given: the Registrant's latest filing on Form

                                      II-3
<PAGE>
20-K, Form 40-F or Form 10-K; and any filing on Form 10-Q, form 8-K or Form 6-K
incorporated by reference in this prospectus.

         The undersigned registrant hereby undertakes to file an application for
the  purpose  of  determining  the  eligibility  of the  trustee  to  act  under
subsection (a) of Section 310 of the Trust  Indenture Act in accordance with the
rules and regulations  prescribed by the Commission  under Section  305(b)(2) of
the Act.

         Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors,  officers and controlling  persons of
the   Registrants   pursuant  to  the   provisions   described   under  Item  15
"Indemnification   of  Directors  and  Officers",   above,  or  otherwise,   the
Registrants have been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore,  unenforceable. In the event that a claim for indemnification
against such  liabilities  (other than the paying by the Registrants of expenses
incurred or paid by a director,  officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director,  officer or controlling person in connection with the securities being
registered,  the  Registrants  will,  unless in the  opinion of its  counsel the
matter  has  been  settled  by  controlling  precedent,  submit  to a  court  of
appropriate  jurisdiction the question whether such  indemnification  is against
public  policy  as  expressed  in the Act  and  will be  governed  by the  final
adjudication of such issue.

                                      II-4
<PAGE>
                                   SIGNATURES

   
         Pursuant to the  requirements  of the  Securities Act of 1933, GST USA,
Inc.  certifies that it has  reasonable  grounds to believe that it meets all of
the requirements for filing on Form F-2 and has duly caused this Amendment No. 2
to the  Registration  Statement  to be signed on its behalf by the  undersigned,
thereunto duly authorized, in the City of Vancouver, State of Washington, on May
6, 1996.
    

                                        GST USA, INC.


                                        By:              *
                                               ----------------------
                                               W. Gordon Blankstein,
                                               Chairman of the Board


   
         Pursuant to the  requirements of the Securities Act, this  Registration
Statement has been signed by the following  persons in the capacities  indicated
on May 6, 1996.
    

            SIGNATURE                            TITLE


               *
- ------------------------------       Chairman of the Board
W. Gordon Blankstein

               *
- ------------------------------       President, Chief Executive Officer and
John Warta                           Director
                                     (Principal Executive Officer)

/s/ Robert H. Hanson
- ------------------------------       Senior Vice President, Chief Financial
Robert H. Hanson                     Officer and Director
                                     (Principal Financial Officer)


              *
- ------------------------------       Senior Vice President, Treasurer and Chief
Clifford V. Sander                   Accounting Officer and Director
                                     (Principal Accounting Officer)


              *
- ------------------------------       Vice President and Director
Thomas E. Sawyer



*By: /s/ Robert H. Hanson
     --------------------
     Robert H. Hanson, Attorney-in-Fact


                                      II-5
<PAGE>

                                   SIGNATURES

   
         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  GST
Telecommunications,  Inc.  certifies that it has  reasonable  grounds to believe
that it meets all the  requirements  for filing on Form F-2 and has duly  caused
this Amendment No. 2 to the Registration Statement to be signed on its behalf by
the undersigned,  thereunto duly authorized, in the City of Vancouver,  State of
Washington, on May 6, 1996.
    


                                        GST TELECOMMUNICATIONS, INC.


                                        By:              *
                                               ----------------------
                                               W. Gordon Blankstein,
                                               Chairman of the Board

   
         Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities indicated
on May 6, 1996.
    

        SIGNATURE                          Title

              *
- -------------------------------             Chairman of the Board
     (W. Gordon Blankstein)

              *
- -------------------------------             President, Chief Executive Officer
     (John Warta)                           (Principal Executive Officer) and 
                                            Director

/s/ Robert H. Hanson                        Senior Vice President - Corporate 
- -------------------------------             Development, Chief Financial Officer
     (Robert H. Hanson)                     (Principal Financial Officer) and 
                                            Director

              *
- -------------------------------             Senior Vice President, Treasurer 
     (Clifford V. Sander)                   and Chief Accounting Officer 
                                            (Principal Accounting Officer)

              *
- -------------------------------             Vice Chairman of the Board, 
     (Stephen Irwin)                        Secretary and Director

              *
- -------------------------------             Director
     (Ian Watson)

              *
- -------------------------------             Director
     (Peter E. Legault)

              *
- -------------------------------             Director
     (Jack G. Armstrong)


- -------------------------------             Director
     (Takashi Yoshida)

              *
- -------------------------------             Director
     (Thomas E. Sawyer)



*By /s/ Robert H. Hanson
    ---------------------------
    Robert H. Hanson, Attorney-In-Fact



The Company's Authorized Representative
in the United States


/s/ Robert H. Hanson
- -------------------------------
Robert H. Hanson

                                      II-6
<PAGE>
                                  EXHIBIT INDEX


         1        Placement Agreement dated December 14, 1995, by and among GST,
                  GST USA, the Specified  Subsidiaries  named therein and Morgan
                  Stanley  & Co.  Incorporated  (incorporated  by  reference  to
                  Exhibit 2.2 to GST's Annual Report on Form 20-F for the fiscal
                  year ended September 30, 1995).

         4        Senior Notes  Indenture  dated as of December 19, 1995, by and
                  among GST USA, GST and United States Trust Company of New York
                  (incorporated  by  reference  to Exhibit  2.3 to GST's  Annual
                  Report on Form 20-F for the fiscal  year ended  September  30,
                  1995).

         5        Opinion of Olshan Grundman Frome & Rosenzweig LLP.

         8        Opinion of Olshan Grundman Frome & Rosenzweig LLP (included in
                  Exhibit 5 to this Registration Statement).

       **23.1     Consent of KPMG Peat Marwick LLP.

       **23.2     Consent of KPMG Peat Marwick Thorne.

       **23.3     Consent of KPMG Peat Marwick LLP.

         23.4     Consent of Olshan Grundman Frome & Rosenzweig LLP (included in
                  Exhibit 5 to this Registration Statement).

       **23.5     Consent of KPMG Peat Marwick Thorne.

         25       Statement of eligibility of trustee.

         99.1     Senior Notes Registration  Rights Agreement dated December 19,
                  1995, by and among GST USA,  GST, the  Specified  Subsidiaries
                  named   therein   and  Morgan   Stanley  &  Co.   Incorporated
                  (incorporated  by  reference  to  Exhibit  25 to GST's  Annual
                  Report on Form 20-F for the fiscal  year ended  September  30,
                  1995).

         99.2     Letter of Transmittal  for Tender of all  outstanding  13-7/8%
                  Senior  Discount Notes Due 2005 in exchange for 13-7/8% Senior
                  Discount Exchange Notes Due 2005 of GST USA, Inc.

         99.3     Tender for all  outstanding  13-7/8% Senior Discount Notes Due
                  2005 in exchange for 13- 7/8% Senior  Discount  Exchange Notes
                  Due 2005 of GST USA, Inc.

         99.4     Instruction  to  Registered  Holder from  Beneficial  Owner of
                  13-7/8% Senior Discount Notes due 2005 of GST USA, Inc.

         99.5     Notice of Guaranteed  Delivery for outstanding  13-7/8% Senior
                  Discount  Notes  Due  2005  in  exchange  for  13-7/8%  Senior
                  Discount Exchange Notes Due 2005 of GST USA, Inc.



**Filed herewith


               CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS



The Board of Directors
GST Telecommunications, Inc.:


We consent to the use of our report included in Form 20-F, dated November 17,
1995 except for note 12(b) and (c) which are as of December 19, 1995 and
November 20, 1995, respectively, incorporated herein by reference in the
Registration Statement on Form F-2, dated May 6, 1996, of GST
Telecommunications, Inc. and to the references to our firm under the "Experts"
heading in the prospectus.


                                  /S/ KPMG PEAT MARWICK LLP


Portland, Oregon
May 6, 1996


KPMG PEAT MARWICK THORNE                        Telephone No. (604) 691-3000
CHARTERED ACCOUNTANTS                                         (604) 691-3031
BOX 10426
777 DUNSMUIR STREET
VANCOUVER, BC V7Y 1K3
CANADA

ACCOUNTANTS' CONSENT


To the Directors of
GST Telecommunications, Inc.
(formerly Greenstar Telecommunications Inc.)


We consent to the incorporation by reference in the registration statement filed
May 6, 1996 on Form F-2 of GST Telecommunications, Inc. (formerly Greenstar
Telecommunications Inc.) of our report dated December 8, 1994, relating to the
consolidated balance sheets of GST Telecommunications, Inc. as of September 30,
1994 and August 31, 1993 and the related consolidated statements of operations
and deficit and changes in financial position for the thirteen months ended
September 30, 1994 and for the years ended August 31, 1993 and 1992, which
report appears in the September 30, 1995 annual report on Form 20-F of GST
Telecommunications, Inc., and to the reference to our firm as experts in the
registration statement.


/S/ KPMG PEAT MARWICK THORNE

Chartered Accountants
Vancouver, Canada
May 6, 1996

Member Firm of
Klynveld Peat Marwick Goerdeler


               CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS


The Board of Directors
GST Telecommunications, Inc.:

We consent to the use of our report over the financial statements of
International Telemanagement Group, Inc. included herein, dated July 21, 1995 in
the Registration Statement on Form F-2, dated May 6, 1996, of GST
Telecommunications, Inc. and to the references to our firm under the "Experts"
heading in the prospectus.


                                     /S/ KPMG PEAT MARWICK LLP


Detroit Michigan
May 6, 1996

KPMG PEAT MARWICK THORNE                      Telephone No. (604) 691-3000
CHARTERED ACCOUNTANTS                                       (604) 691-3031
BOX 10426
777 DUNSMUIR STREET
VANCOUVER, BC V7Y 1K3
CANADA



                          INDEPENDENT AUDITORS' CONSENT


The Board of Directors
GST Telecommunications, Inc.


We consent to the use of our reports dated November 11, 1994 and January 12,
1994 except for note 4 which is as of January 21, 1994, relating to the balance
sheets of IntelCom-Greenstar Joint Venture as of September 30, 1994 and 1993,
respectively and the related statements of operations and participants' equity,
and financial position for the years ended September 30, 1994 and 1993
respectively included in Form 20-F, incorporated herein by reference in the
Registration Statement of Form F-2, dated May 6, 1996, of GST
Telecommunications, Inc. and to the references to our firm under the "Experts"
heading in the prospectus.


/S/ KPMG PEAT MARWICK THORNE


Chartered Accountants

Edmonton, Canada
May 6, 1996

Member Firm of
Klynveld Peat Marwick Goerdeler


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