GABELLI GLOBAL SERIES FUNDS INC
N-30B-2, 2000-05-18
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[Flag graphic omitted]

GABELLI GLOBAL OPPORTUNITY FUND

FIRST QUARTER REPORT
MARCH 31, 2000

                             [Photo of Marc J. Gabelli and Caesar Bryan omitted]
                                                MARC J. GABELLI AND CAESAR BRYAN
                                                              Portfolio Managers

TO OUR SHAREHOLDERS:

      The U.S.  economy  certainly went for a bumpy ride in the first quarter of
2000.  Facing  tremendous  point losses towards the end of the first quarter and
the beginning of the second quarter,  American  indices lost record  percentages
over the course of a few days.  A feeling of  uncertainty  has swept over global
equity markets, as investors try to determine if these recent losses stand alone
or if they are the beginning of an all-out price  correction.  The first quarter
of 2000  started  off  well  for the  Gabelli  Global  Opportunity  Fund.  While
investors  around the world scattered and watched  performance  torpedo downward
during the last few weeks of the quarter,  Global  Opportunity Fund shareholders
watched their Fund  continue to post  significant  gains and assuage  investors'
uneasiness about the future.

INVESTMENT PERFORMANCE

      For the first quarter ended March 31, 2000, The Gabelli Global Opportunity
Fund's  (the  "Fund")  total  return  was  5.77%.  The  Morgan  Stanley  Capital
International  World Free Index of global equity  markets and Lipper Global Fund
Average  had total  returns  of 1.17%  and  3.63%,  respectively,  over the same
period.  The Morgan Stanley World Free Index is an unmanaged  indicator of stock
market performance, while the Lipper Average reflects the average performance of
mutual  funds  classified  in  this  particular  category.  The  Fund  was  up a
staggering  74.34% over the trailing  twelve-month  period.  The Morgan  Stanley
World  Free  Index and Lipper  Global  Fund  Average  rose  23.42%  and  37.71%,
respectively, over the same twelve-month period. Since inception on May 11, 1998
through March 31, 2000, the Fund had a cumulative total return of 108.68%, which
equates to an average annual total return of 47.49%.


<PAGE>

INVESTMENT RESULTS (a)
- --------------------------------------------------------------------------------
                                         Quarter
                         -----------------------------------------
                           1st       2nd         3rd         4th        Year
                           ---       ---         ---         ---        ----
2000: Net Asset Value    $19.07       --          --          --         --
      Total Return         5.8%       --          --          --         --
- -----------------------------------------------------------------------------
1999: Net Asset Value    $11.47     $13.00      $13.61      $18.03     $18.03
      Total Return         8.7%      13.3%        4.7%       38.9%      79.2%
- -----------------------------------------------------------------------------
1998: Net Asset Value       --      $10.23       $9.69      $10.55     $10.55
      Total Return          --        2.3%(b)   (5.3)%       13.7%      10.1%(b)
- -----------------------------------------------------------------------------


- --------------------------------------------------
    Average Annual Returns - March 31, 2000 (a)
    -------------------------------------------
  1 Year ...............................   74.34%
  Life of Fund (b) .....................   47.49%
- --------------------------------------------------

                    Dividend History
- ----------------------------------------------------------
Payment (ex) Date    Rate Per Share     Reinvestment Price
- -----------------    --------------     ------------------
December 27, 1999        $0.850               $17.48
December 28, 1998        $0.450               $10.34

(a) Total returns and average annual returns  reflect changes in share price and
reinvestment  of dividends  and are net of expenses.  The net asset value of the
Fund is reduced on the ex-dividend  (payment) date by the amount of the dividend
paid. Of course,  returns represent past performance and do not guarantee future
results.  Investment  returns  and the  principal  value of an  investment  will
fluctuate.  When shares are  redeemed  they may be worth more or less than their
original cost. (b) From  commencement of investment  operations on May 11, 1998.
Note:  Investing in foreign securities involves risks not ordinarily  associated
with investments in domestic issues,  including currency  fluctuation,  economic
and political risks.
- --------------------------------------------------------------------------------

MULTI-CLASS SHARES

      The Gabelli Global Series Funds, Inc. began offering additional classes of
Fund shares in March 2000.  The  existing  shares  remain  no-load and have been
redesignated  as "Class  AAA"  Shares.  Class A,  Class B and Class C shares are
targeted  to  the  needs  of  investors  who  seek  advice   through   financial
consultants.  For the month ended March 31, 2000, The Gabelli Global Opportunity
Fund Class A Shares  declined  1.70%  (Class B and Class C Shares  have not been
issued as of March 31,  2000).  The Class A Shares  ended the quarter with a net
asset value of $19.06.

GLOBAL ALLOCATION

      The accompanying  chart presents the Fund's holdings by geographic  region
as of March 31, 2000.  The  geographic  allocation  will change based on current
global market conditions.  Countries and/or regions represented in the chart and
below may or may not be included in the Fund's future portfolio.

[GRAPHIC OMITTED]

EDGAR REPRESETNATION OF DATA POINTS USED IN PRINTED GRAPHIC:

HOLDINGS BY GEOGRAPHIC REGION - 3/31/00
Europe                       36.3%
United States                17.6%
Japan                        13.0%
Canada                        4.4%
Asia/Pacific Rim              2.7%
Latin America                 0.5%
Cash                         25.5%

                                        2

<PAGE>

COMMENTARY

      For a good number of reasons,  the investment  environment has become more
challenging.  First,  stocks have had a good run in most international  markets.
This is especially so for  companies  involved in many of the growth  sectors of
the economy.  On the other hand, slower growth sectors of the market have lagged
badly.  Therefore,  some rotation from the winners to the losers can be expected
and has already occurred.

      Second,  the Federal Reserve Board and other central banks,  including the
European  Central Bank, are raising  interest  rates.  Higher interest rates are
generally not positive for equity  markets.  However,  if higher  interest rates
slow the economy and prevent inflation from rising, equity markets should not be
too adversely affected.

      Japan remains the exception to this.  Short-term  interest  rates in Japan
remain effectively at zero and the ten-year government bond yields less than 2%.
The  authorities  have  stated that  interest  rates in Japan will remain at low
levels until a  self-sustaining  economic  recovery takes hold.  Recent economic
statistics suggest that a turnaround is near.  Corporate  investment has revived
and the  consumer,  dormant for so long,  is  beginning  to stir.  This  nascent
consumer  activity  is  based  upon a rise in wages  that  actually  had  fallen
significantly  during the past two years. A decline in wages is a highly unusual
occurrence in a developed economy.

     In Canada,  the announced  restructuring of BCE reflects many of the trends
that  have  helped  propel   telecommunications   stocks  in  recent  years  and
illustrates  the  kind of  value  still  available  in the  marketplace.  BCE is
surfacing  value  by  spinning  off its  stake in a  leading  telecommunications
equipment  maker,  Nortel  Networks.  It is broadening its geographic  reach and
increasing  its  exposure to new  technologies  and services by  increasing  its
ownership  interest  in  Teleglobe.  Finally,  BCE is  attempting  to marry  its
distribution  with  content  through  an  unsolicited  bid for CTV,  a  Canadian
broadcaster with strong news and sports  programming  assets.  We believe BCE is
making all the right  strategic  moves and value the company at more than double
its current stock price.  We also note that U.S. "Baby Bell" SBC  Communications
owns  20%  of  BCE  subsidiary  Bell  Canada.   If  Canadian  foreign  ownership
restrictions   are   repealed,   SBC  or  some  other   large  U.S.  or  foreign
telecommunications concern could seek to acquire BCE outright.

      Looking  ahead,  we expect the  portfolio  to remain  concentrated  in the
European markets.  We believe these markets should provide attractive returns as
the European economy becomes more competitive  following the introduction of the
euro. We anticipate many industries  continuing their  consolidation,  including
telecommunications  and media. We believe the takeover of Mannesmann by Vodafone
is only the  beginning.  Recent media deals have  validated the high  valuations
accorded  to  media  properties  in  Europe.   Here  again,  we  expect  further
transactions that will benefit our portfolio holdings.

                                        3

<PAGE>

THE SCORECARD

      Telecommunications  stocks were  performance  leaders  this  quarter.  Our
leader board was  dominated by wired and wireless  telecommunications  providers
from around the globe,  including  Vodafone AirTouch,  Telecom Italia,  Citizens
Utilities,  Cable  &  Wireless,  BCE  and  good  old  AT&T.  Publishers  such as
Independent News & Media and Schibsted also posted measurable gains.

      Cable television  operators such as NTL retreated,  due in part to reduced
merger and acquisition  activity in the sector, while health care companies such
as  Roche  Holdings,  Novartis  and  Sanofi-Synthelabo  also  spent  time in the
infirmary.

LET'S TALK STOCKS

ALLIANZ AG (ALVG.F - $407.44 - FRANKFURT STOCK EXCHANGE) provides many insurance
and  reinsurance  products  including  property,   casualty,   life  and  health
insurance. Allianz operates in over fifty countries through its subsidiaries and
affiliates.  The  company  owns  brands  such as AGF in France and RAS is Italy.
Allianz controls  significant stakes in a number of leading financial  companies
in Germany and will be at the center of any reorganization of corporate Germany.

AUDIOFINA  (AUDK.LU - $123.05 - LUXEMBOURG STOCK EXCHANGE) is a Luxembourg-based
European  entertainment company. The company holds 49.85% of CLT-UFA, which owns
22 television channels with 120 million daily viewers and 18 radio stations with
25 million daily  listeners.  CLT-UFA also holds the  broadcasting and marketing
rights to numerous  European sports teams. The recent agreement  merging Pearson
plc's  television  assets with CLT-UFA will  strengthen  the company's  position
globally.

BCE INC. (BCE - $125.4375 - NYSE) is Canada's global communications company. BCE
has announced a series of  transactions  in recent months.  The company plans to
spin off the  majority  of its stake in Nortel  Networks  Corp.  (NT - $126.00 -
NYSE) to BCE  shareholders.  BCE shareholders will receive 0.78 shares of NT per
BCE share. Other pending transactions include the acquisition of CTV, a Canadian
broadcaster, and Teleglobe, a provider of global network services.

BELL ATLANTIC CORP. (BEL - $61.125 - NYSE),  following its merger with NYNEX and
with its  pending  merger  with GTE (GTE -  $71.00 - NYSE),  becomes  a  premier
provider of advanced voice and data services from Maine to Virginia--the world's
most  information-intensive  marketplace.  Bell  Atlantic  is one of the world's
largest and most successful wireless  companies,  with domestic operations in 24
states and  international  investments in Latin America,  Europe and the Pacific
Rim.  In early  April,  BEL and  Vodafone  Airtouch  plc (VOD - $55.5625 - NYSE)
finished  combining their U.S.  wireless  operations into a joint venture called
Verizon  Wireless  which will reach more than 90% of the U.S.  population.  Upon
completion  of the merger with GTE,  expected by the end of the second  quarter,
BEL will be renamed Verizon Communications and

                                        4

<PAGE>

will  become  the  largest  domestic  wireless  carrier  with  about 25  million
subscribers.  BEL is also a  global  leader  in  publishing  directories  and in
providing  Internet-based  shopping guides,  website  creation and hosting,  and
other electronic commerce services. The company has a mix of mature and start-up
communications businesses in Europe and the Pacific Rim, including a 24.9% stake
in  Telecom  Corp.  of New  Zealand  and an  18.5%  stake  in  Cable &  Wireless
Communications.

CANAL  PLUS  (CNLP.PA  - $220.24 - PARIS  STOCK  EXCHANGE)  is the  leading  pay
television  company operating  throughout Europe with the exception of the U.K.,
Ireland and Germany.  Canal Plus provides  premium  channels as well as film and
television  programming.  The company has  expanded  its  businesses  to include
digital  television  service  and is a  majority  owner in  Numericable,  one of
France's top three cable operators, and Paris St. Germain, the top French soccer
club.

CITIZENS  UTILITIES  CO.  (CZN -  $16.375  - NYSE)  provides  telecommunications
services  and public  services  to  approximately  1.9 million  customers  in 22
states.  Citizens owns 83% of Electric Lightwave Inc. (ELIX - $23.875 - Nasdaq),
a competitive local exchange carrier ("CLEC") serving primarily the western U.S.
Management  has  authorized  the  separation  of  Citizens'   telecommunications
businesses and public services businesses into two stand-alone,  publicly traded
companies.  Recently,  CZN announced agreements to acquire about 1 million rural
access  lines in 11 states  for $2.8  billion.  CZN  intends  to  finance  these
transactions  by divesting its public services  operations.  Its water and waste
water  operations have been sold for $835 million.  The company has an agreement
to sell all its electric and waste water  utility  operations to Cap Rock Energy
and Kauai  Island  Electric  Company  for an  aggregate  purchase  price of $535
million.  The company has sold its 16% stake in Centennial  Communications Corp.
for  approximately  $205  million.  Citizens  monetized its ownership of Century
Communications'  (CTYA - $45.625 - Nasdaq) stock and cable operations  through a
sale to Adelphia Communications for approximately $220 million.

COMPAGNIE  FINANCIERE  RICHEMONT AG (RIFZ.S - $2,541.58 - ZURICH STOCK EXCHANGE)
is one of the world's  leading  luxury goods  companies with such brand names as
Cartier, Piaget,  Montblanc, Karl Lagerfeld and Alfred Dunhill. The company also
has a major investment in tobacco with its significant investment in B.A.T., the
world's second largest tobacco  company.  Adjusted for its stake in B.A.T.,  the
market values its wholly owned luxury goods  business at a significant  discount
to other luxury goods producers.

CRH PLC  (CRH.L - $18.00 - LONDON  STOCK  EXCHANGE)  is a Dublin,  Ireland-based
international  building materials company that has an excellent  long-term track
record  of  increasing  earnings  per  share.  CRH  is a  leading  producer  and
distributor of a wide range of building products and materials that has grown by
making  acquisitions  that are complimentary to its existing  operations.  CRH's
diversity  in its  product  line and  geographic  reach keep this  company  well
protected against a slow down in any one particular  product segment or country.
This global presence should contribute to CRH's continued growth.

                                        5

<PAGE>

FURUKAWA ELECTRIC CO. LTD. (5801.T - $16.80 - TOKYO STOCK EXCHANGE) manufactures
electric wire and cable,  light metals,  and optical-fiber  cables.  The company
also  provides  related  services,  including  installation.  Furukawa  is  also
expanding into superconductor wire and optical transmission, network systems and
devices. The company has a significant stake in JDS Uniphase, a Canadian optical
equipment manufacturer.

GRANADA GROUP PLC (GAA.L - $10.71 - LONDON STOCK  EXCHANGE) is a dominant  media
and  hospitality  company in the U.K.  The  company is  focusing  its efforts on
building  leading  brands  that offer a full range of products  and  services in
their   markets.   Granada   operates   Ondigital   with  its  partner   Carlton
Communications  and Granada Sky Broadcasting  with its partner BSkyB.  These pay
television initiatives  complement Granada's programming expertise,  positioning
the company to take advantage of the growth in the pay television sector.

INVIK & CO.  AB  (INVIKA  - $144.89 -  STOCKHOLM  STOCK  EXCHANGE)  is a holding
company  based in Sweden.  The  company  currently  trades at a discount  to its
underlying  assets.  Nearly all of  Invik's  investments  are in other  publicly
traded  companies.  The most  important  investment  is Netcom,  which is a full
service  telecommunications  company based in Sweden.  Other investments include
Kinnevik and MTG.  Management  has a successful  record of building  shareholder
value.

MELLON  FINANCIAL  CORP.  (MEL -  $105.00  - NYSE) is one of the  largest  asset
managers in the country.  In addition to the Bank's asset  gathering  arm, their
Dreyfus  and Boston  Company  subsidiaries  continue  to grow and  prosper.  New
management is shedding  non-core assets to focus on the company's highest margin
and best growth  opportunities.  Fees  represent  over 60% of revenues  and that
number will grow as the year progresses.  The bank prefers to remain independent
but it is an attractive property to all the financial services companies seeking
to boost their asset management businesses.

NIPPON  BROADCASTING SYSTEM INC. (4660.T - $79.08 - TOKYO STOCK EXCHANGE) is the
top  listener-rated  AM radio  broadcaster  in Japan and also  operates  a music
subsidiary,  Pony Canyon.  Nippon  distributes its content through the Internet,
digital satellite,  mobile Internet and terrestrial means. The company is also a
large shareholder of Fuji Television.

NOVARTIS  AG (NOVN.S -  $1,367.94 - ZURICH  STOCK  EXCHANGE)  is the Swiss based
pharmaceutical  and life  sciences  company.  Novartis  is the  world's  largest
pharmaceutical  company  in  terms  of  sales  and is also  the  largest  global
agrochemical company.  Novartis'  pharmaceutical business represents roughly two
thirds  of sales  with  agribusiness  comprising  one  quarter  and the  balance
belonging  to the  nutrition  business.  Novartis'  principal  products  include
Sandimmune/Neoral,   the  organ  transplant  rejection  drug,  and  Lescol,  the
lipid-lowering agent.

TELECOM  ITALIA  MOBILE SPA  (TIM.MI - $12.28 - MILAN  STOCK  EXCHANGE),  is the
leading mobile provider in Italy, one of the most highly  penetrated  markets in
the world,  with more than 18 million  subscribers.  The  company  has seen good
response to its initial wireless data application products including short

                                        6

<PAGE>

messaging  services.  Telecom  Italia  Mobile  continues  to succeed in a stable
competitive environment that includes two established  competitors,  Omnitel and
Wind, as well as a new emerging  competitor.  The Italian  government will award
additional  licenses,  designated UMTS licenses,  in the near future. These will
provide existing  operators the opportunity to acquire  additional  capacity for
the  provision  of high  bandwidth  services and create an  opportunity  for new
competitive entry.

VIVENDI (EX - $115.38 - PARIS STOCK EXCHANGE) is a Paris based company which was
originally  involved in the utility  business.  Cash flow from running municipal
water  and  waste   operations  has  been  reinvested  in  media  and  telephony
operations.  Its  telephony  business is  conducted  through  Cegetel and SFR in
France.  In the media  sector,  Vivendi  owns Havas,  a leading  publisher,  and
significant   equity   stakes   in   Europe's   two   leading   pay   television
companies--Canal  Plus and BSkyB.  More  recently,  the company has undertaken a
number of Internet initiatives, including a joint venture with Vodafone AirTouch
to develop a multi access portal (MAP).

MINIMUM INITIAL INVESTMENT - $1,000

      The Fund's  minimum  initial  investment  for both regular and  retirement
accounts is $1,000.  There are no  subsequent  investment  minimums.  No initial
minimum  is  required  for those  establishing  an  Automatic  Investment  Plan.
Additionally,  The Gabelli Global  Opportunity  Fund and other Gabelli Funds are
available  through  the  no-transaction  fee  programs  at many  major  discount
brokerage firms.

INTERNET

      You   can   now   visit   us  on  the   Internet.   Our   home   page   at
http://www.gabelli.com contains information about Gabelli Asset Management Inc.,
the Gabelli Mutual Funds, IRAs, 401(k)s,  quarterly reports,  closing prices and
other current news. You can send us e-mail at [email protected].

IN CONCLUSION

      As we look out upon what  will  certainly  prove to be a most  interesting
year for  investors,  we can not help but be filled with  trepidation  about the
future. What surprises will this new year, decade, century and millennium bring?
How will the global equity  markets,  already shaken up in recent weeks,  handle
the  inevitable  disappointments  that are sure to come our way?  How will these
changes effect each of us, and our investments for the future?  While no one can
answer  these  questions  with  complete  certainty,  we at the  Gabelli  Global
Opportunity Fund feel that our unique valuation process, operating in the global
growth  environments,  should continue to provide safety and security for all of
our  shareholders.  Our  conservative  approach to global  growth  investing has
rewarded us in the past, and we expect it to continue to do so in the future.

                                        7

<PAGE>

      The Fund's daily net asset value is available in the  financial  press and
each   evening   after  6:00  PM   (Eastern   Time)  by  calling   1-800-GABELLI
(1-800-422-3554).  The Fund's Nasdaq symbol is GABOX.  Please call us during the
business day for further information.

                                   Sincerely,

          /S/ MARC J.GABELLI                /S/ CAESAR BRYAN

          MARC J. GABELLI                   CAESAR BRYAN
          Portfolio Manager                 Portfolio Manager

                                            /S/ IVAN ARTEAGA

                                            IVAN ARTEAGA, CFA
                                            Associate Portfolio Manager

April 14, 2000

- --------------------------------------------------------------------------------
                                TOP TEN HOLDINGS
                                 MARCH 31, 2000
                                 --------------
               Canal Plus                Gruppo Editoriale L'Espresso SpA
               Bell Atlantic Corp.       Citizens Utilities Co.
               Invik & Co. AB            Net One Systems Co. Ltd.
               BCEInc.                   Vivendi
               Allianz AG                Furukawa Electric Co. Ltd.
- --------------------------------------------------------------------------------

NOTE: The views expressed in this report reflect those of the portfolio  manager
only through the end of the period stated in this report.  The  manager's  views
are subject to change at any time based on market and other conditions.

                                        8

<PAGE>

THE GABELLI GLOBAL OPPORTUNITY FUND
PORTFOLIO OF INVESTMENTS -- MARCH 31, 2000 (UNAUDITED)
- --------------------------------------------------------------------------------

                                                   MARKET
     SHARES                                         VALUE
     ------                                        ------

              COMMON STOCKS -- 73.7%
              AEROSPACE -- 0.0%
          1   British Aerospace plc .........   $         3
                                                -----------
              AUTOMOTIVE -- 1.0%
      5,000   General Motors Corp. ..........       414,063
                                                -----------
              BROADCASTING -- 5.8%
      3,650   Audiofina .....................       449,115
         15   Fuji Television Network Inc. ..       260,018
     39,800   Granada Group plc .............       426,241
     15,000   Mediaset SpA ..................       298,181
      3,000   Nippon Broadcasting System Inc.       237,230
      1,000   Nippon Broadcasting System Inc.,
               New Shares+ ..................        79,077
        500   NRJ SA ........................       371,051
      6,000   Tokyo Broadcasting System Inc.        236,646
                                                -----------
                                                  2,357,559
                                                -----------
              BUILDING AND CONSTRUCTION -- 0.9%
     20,300   CRH plc .......................       365,439
                                                -----------
              BUSINESS SERVICES -- 3.2%
      5,000   Asatsu-DK Inc. ................       253,688
     15,000   Reuters Holdings plc ..........       303,849
          1   Sabre Holdings Corp.+ .........            35
      3,000   Secom Co. Ltd. ................       257,097
      4,378   Vivendi .......................       505,097
                                                -----------
                                                  1,319,766
                                                -----------
              CABLE -- 1.4%
      2,187   NTL Inc.+ .....................       202,981
      5,000   UnitedGlobalCom Inc., Cl. A+ ..       375,313
                                                -----------
                                                    578,294
                                                -----------
              COMMUNICATIONS EQUIPMENT -- 4.2%
     30,000   Furukawa Electric Co. Ltd. ....       503,968
      4,300   GN Store Nord A/S .............       373,173
     27,000   Marconi plc ...................       321,837
      3,000   Telelogic AB+ .................       271,241
      7,000   Telesystem International
               Wireless Inc.+ ...............       254,129
                                                -----------
                                                  1,724,348

                                                -----------
              COMPUTER SOFTWARE AND SERVICES -- 1.3%
         15   Net One Systems Co. Ltd. ......       540,488
                                                -----------
              CONSUMER PRODUCTS -- 2.9%
      2,000   Christian Dior SA .............       462,880
        150   Compagnie Financiere
               Richemont AG, Cl. A ..........       381,237
      2,000   Nintendo Co. Ltd. .............       351,561
                                                -----------
                                                  1,195,678
                                                -----------



                                                   MARKET
     SHARES                                         VALUE
     ------                                        ------
              ELECTRONICS -- 1.5%
      2,000   Kyocera Corp. .................   $   334,226
      1,000   Sony Corp., ADR ...............       280,125
                                                -----------
                                                    614,351
                                                -----------
              ENERGY AND UTILITIES -- 0.5%
      2,500   Schlumberger Ltd. .............       191,250
                                                -----------
              ENTERTAINMENT -- 5.9%
      2,000   Avex Inc. .....................       380,776
      3,700   Canal Plus ....................       814,875
      6,088   Liberty Media Group, Cl. A+ ...       360,714
     30,000   Publishing & Broadcasting Ltd.        254,569
      4,500   Seagram Co. ...................       267,750
     15,000   USA Networks Inc.+ ............       338,438
                                                -----------
                                                  2,417,122
                                                -----------
              FINANCIAL SERVICES -- 11.7%
      1,600   Allianz AG ....................       651,900
      2,000   AXA-UAP .......................       283,626
      6,000   Citigroup Inc. ................       355,875
      5,000   Invik & Co. AB, Cl. B .........       724,470
     25,000   Mediolanum SpA ................       442,149
     15,000   Mellon Financial Corp. ........       442,500
      4,500   Merrill Lynch & Co. Inc. ......       472,500
      3,500   Morgan (J.P.) & Co. Inc. ......       461,125
     20,000   Prudential Corp. plc ..........       301,460
     25,000   San Paolo - IMI SpA ...........       342,563
     30,000   Skandinaviska Enskilda Banken, Cl. A  323,403
                                                -----------
                                                  4,801,571
                                                -----------
              HEALTH CARE -- 3.2%
        240   Novartis AG ...................       328,306
         40   Roche Holding AG ..............       434,566
      7,000   Sanofi-Synthelabo SA ..........       267,109
     20,000   SmithKline Beecham plc ........       263,718
                                                -----------
                                                  1,293,699
                                                -----------
              HOTELS AND GAMING -- 0.6%
     13,000   Mirage Resorts Inc.+ ..........       251,875
                                                -----------
              METALS AND MINING -- 1.2%
     40,000   Antofagasta Holdings plc ......       250,978
      6,000   Stillwater Mining Co.+ ........       240,000
                                                -----------
                                                    490,978
                                                -----------
              PUBLISHING -- 5.2%
     10,000   Arnoldo Mondadori Editore SpA .       255,187
     32,067   Gruppo Editoriale L'Espresso SpA      629,768
     34,000   Independent News & Media plc, Dublin  333,706
      7,000   News Corp. Ltd., ADR ..........       393,750
      8,000   Schibsted ASA .................       198,022
     25,000   United News & Media plc .......       328,254
                                                -----------
                                                  2,138,687
                                                -----------



                                        9

<PAGE>

THE GABELLI GLOBAL OPPORTUNITY FUND
PORTFOLIO OF INVESTMENTS (CONTINUED) -- MARCH 31, 2000 (UNAUDITED)
- --------------------------------------------------------------------------------

                                                   MARKET
     SHARES                                         VALUE
     ------                                        ------

              COMMON STOCKS (CONTINUED)
              RETAIL -- 0.7%
      4,000   Ito Yokado Co. Ltd. ...........   $   285,923
                                                -----------
              SATELLITE -- 1.1%
      2,500   Societe Europeenne Satellites .       429,701
                                                -----------
              TELECOMMUNICATIONS -- 17.3%
      5,000   AT&T Corp. ....................       281,250
      5,500   BCE Inc. ......................       689,906
     12,000   Bell Atlantic Corp. ...........       733,500
     15,000   British Telecommunications plc        280,678
     10,000   BroadWing Inc.+ ...............       371,875
      7,750   Cable & Wireless plc, ADR .....       434,000
     35,180   Citizens Utilities Co., Cl. B+        576,073
         40   DDI Corp. .....................       326,825
     12,500   Electric Lightwave Inc., Cl. A+       298,438
      5,125   Global Crossing Ltd.+ .........       209,805
         10   Japan Telecom Co. Ltd. ........       423,626
      3,000   KDD Corp. .....................       252,422
     15,000   Manitoba Telecom Services Inc.        262,216
         16   Nippon Telegraph & Telephone Corp.    253,981
    100,000   Olivetti SpA+ .................       359,081
     25,000   Portugal Telecom SA ...........       320,779
     10,500   Rogers Communications Inc.,
               Cl. B, ADR+ ..................       313,031
      1,500   Telecom Italia SpA, ADR .......       228,000
     25,000   Telecom Italia SpA, Cl. RNC ...       170,444
      3,714   Telefonica SA, ADR ............       277,157
                                                -----------
                                                  7,063,087
                                                -----------
              WIRELESS COMMUNICATIONS -- 4.1%
     30,000   Telecom Italia Mobile SpA .....       368,274
      2,300   Telephone & Data Systems Inc. .       255,300
      5,000   United States Cellular Corp.+ .       355,000
     58,965   Vodafone AirTouch plc .........       327,246
      2,888   VoiceStream Wireless Corp.+ ...       371,946
                                                -----------
                                                  1,677,766
                                                -----------
              TOTAL COMMON STOCKS ...........    30,151,648
                                                -----------


 PRINCIPAL                                        MARKET
  AMOUNT                                           VALUE
  ------                                          ------
              U.S. GOVERNMENT OBLIGATIONS -- 25.2%
$10,334,000   U.S. Treasury Bills,
               5.40% to 6.07%++,
               due 04/06/00 to 06/08/00 .....   $10,293,742
                                                -----------
              TOTAL INVESTMENTS -- 98.9%
                (Cost $32,011,581) ..........    40,445,390

              OTHER ASSETS AND
                LIABILITIES (NET) -- 1.1% ...       434,410
                                                -----------
              NET ASSETS -- 100.0%
                (2,144,202 shares outstanding)  $40,879,800
                                                ===========
  ------------------------
  +     Non-income producing security.
  ++    Represents annualized yield at date of purchase.
  ADR - American Depositary Receipt.

                                     % OF
                                    MARKET         MARKET
    GEOGRAPHIC DIVERSIFICATION       VALUE          VALUE
    --------------------------      ------      -----------
    North America ...............    47.5%      $19,227,842
    Europe ......................    36.3%       14,667,746
    Japan .......................    13.0%        5,257,678
    Asia/Pacific Rim ............     2.7%        1,082,319
    Latin America ...............     0.5%          209,805
                                    -----       -----------
                                    100.0%      $40,445,390
                                    =====       ===========

                                        10

<PAGE>
- --------------------------------------------------------------------------------
                             GABELLI FAMILY OF FUNDS
- --------------------------------------------------------------------------------

GABELLI ASSET FUND--------------------------------------------------------------
Seeks to invest primarily in a diversified portfolio of common stocks selling at
significant  discounts  to  their  private  market  value.  The  Fund's  primary
objective is growth of capital.  (NO-LOAD)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI GROWTH FUND-------------------------------------------------------------
Seeks to invest  primarily in large cap stocks believed to have  favorable,  yet
undervalued,  prospects for earnings  growth.  The Fund's  primary  objective is
capital appreciation. (NO-LOAD)
                                          PORTFOLIO MANAGER: HOWARD F. WARD, CFA

GABELLI WESTWOOD EQUITY FUND----------------------------------------------------
Seeks to invest primarily in the common stock of seasoned  companies believed to
have proven records and above average  historical  earnings  growth.  The Fund's
primary objective is capital appreciation. (NO-LOAD)
                                               PORTFOLIO MANAGER: SUSAN M. BYRNE

GABELLI SMALL CAP GROWTH FUND---------------------------------------------------
Seeks  to  invest  primarily  in  common  stock  of  smaller  companies  (market
capitalizations  less than $500  million)  believed  to have rapid  revenue  and
earnings growth potential. The Fund's primary objective is capital appreciation.
(NO-LOAD)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI BLUE CHIP VALUE FUND----------------------------------------------------
Seeks  long-term  growth of capital through  investment  primarily in the common
stocks  of   well-established,   high   quality   companies   that  have  market
capitalizations of greater than $5 billion. (NO-LOAD)
                                         PORTFOLIO MANAGER:  BARBARA MARCIN, CFA

GABELLI WESTWOOD SMALLCAP EQUITY FUND-------------------------------------------
Seeks to invest primarily in smaller  capitalization  equity securities - market
caps of $1 billion or less.  The Fund's primary  objective is long-term  capital
appreciation. (NO-LOAD)
                                            PORTFOLIO MANAGER: LYNDA CALKIN, CFA

GABELLI WESTWOOD INTERMEDIATE BOND FUND-----------------------------------------
Seeks to invest in a diversified portfolio of bonds with various maturities. The
Fund's primary objective is total return. (NO-LOAD)
                                               PORTFOLIO MANAGER: PATRICIA FRAZE

GABELLI EQUITY INCOME FUND------------------------------------------------------
Seeks to invest primarily in equity securities with above market average yields.
The Fund pays quarterly dividends and seeks a high level of total return with an
emphasis on income. (NO-LOAD)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI WESTWOOD BALANCED FUND--------------------------------------------------
Seeks to invest in a balanced and diversified portfolio of stocks and bonds. The
Fund's  primary  objective  is both  capital  appreciation  and current  income.
(NO-LOAD)
                             PORTFOLIO MANAGERS: SUSAN M. BYRNE & PATRICIA FRAZE

GABELLI WESTWOOD MIGHTY MITES[SERVICE MARK] FUND--------------------------------
Seeks to invest in micro-cap companies that have market  capitalizations of $300
million or less. The Fund's primary objective is long-term capital appreciation.
(NO-LOAD)
                                            TEAM MANAGED: MARIO J. GABELLI, CFA,
                                           MARC J. GABELLI, LAURA K. LINEHAN AND
                                                                 WALTER K. WALSH

GABELLI VALUE FUND--------------------------------------------------------------
Seeks to invest in  securities  of  companies  believed to be  undervalued.  The
Fund's primary objective is long-term capital  appreciation.  MAX. SALES CHARGE:
5 1/2%
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI UTILITIES FUND----------------------------------------------------------
Seeks to provide a high level of total return  through a combination  of capital
appreciation and current income.  (NO-LOAD)
                                         PORTFOLIO MANAGER: TIMOTHY O'BRIEN, CFA

GABELLI ABC FUND----------------------------------------------------------------
Seeks to invest in securities with attractive  opportunities for appreciation or
investment  income.  The Fund's  primary  objective  is total  return in various
market conditions without excessive risk of capital loss. (NO-LOAD)
                                        PORTFOLIO MANAGER: MARIO J. GABELLI, CFA

GABELLI MATHERS FUND------------------------------------------------------------
Seeks  long-term  capital  appreciation  in various  market  conditions  without
excessive risk of capital loss. (NO-LOAD)
                                        PORTFOLIO MANAGER: HENRY VAN DER EB, CFA

GABELLI U.S. TREASURY MONEY MARKET FUND-----------------------------------------
Seeks to invest exclusively in short-term U.S. Treasury  securities.  The Fund's
primary  objective  is to  provide  high  current  income  consistent  with  the
preservation of principal and liquidity.  (NO-LOAD)
                                             PORTFOLIO MANAGER: JUDITH A. RANERI

GABELLI CASH MANAGEMENT SHARES OF
THE TREASURER'S FUND------------------------------------------------------------
Three money market  portfolios  designed to generate  superior  returns  without
compromising  portfolio  safety.  U.S.  Treasury Money Market seeks to invest in
U.S. Treasury bills, notes and bonds. Tax Exempt Money Market seeks to invest in
municipal  securities.  Domestic  Prime  Money  Market  seeks to invest in prime
quality, domestic money market instruments. (NO-LOAD)
                                             PORTFOLIO MANAGER: JUDITH A. RANERI


AN INVESTMENT IN THE ABOVE MONEY MARKET FUNDS IS NEITHER  INSURED NOR GUARANTEED
BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY GOVERNMENT AGENCY.  ALTHOUGH
THE FUNDS SEEK TO PRESERVE THE VALUE OF YOUR  INVESTMENT AT $1.00 PER SHARE,  IT
IS POSSIBLE TO LOSE MONEY BY INVESTING IN THE FUNDS.

GLOBAL SERIES

  GABELLI GLOBAL TELECOMMUNICATIONS FUND
  Seeks  to  invest  in  telecommunications  companies  throughout  the  world -
  targeting  undervalued  companies with strong earnings and cash flow dynamics.
  The Fund's primary objective is capital appreciation. (NO-LOAD)
                                            TEAM MANAGED: MARIO J. GABELLI, CFA,
                                           MARC J. GABELLI AND IVAN ARTEAGA, CFA

  GABELLI  GLOBAL  CONVERTIBLE  SECURITIES  FUND
  Seeks  to  invest   principally  in  bonds  and  preferred  stocks  which  are
  convertible  into common stock of foreign and domestic  companies.  The Fund's
  primary  objective is total return through a combination of current income and
  capital appreciation. (NO-LOAD)
                                                 PORTFOLIO MANAGER: HART WOODSON

  GABELLI GLOBAL GROWTH FUND
  Seeks capital appreciation  through a disciplined  investment program focusing
  on the globalization and  interactivity of the world's  marketplace.  The Fund
  invests in  companies  at the  forefront  of  accelerated  growth.  The Fund's
  primary objective is capital appreciation. (NO-LOAD)
                                              PORTFOLIO MANAGER: MARC J. GABELLI

  GABELLI GLOBAL OPPORTUNITY FUND
  Seeks to  invest in common  stock of  companies  which  have  rapid  growth in
  revenues and earnings and potential for above average capital  appreciation or
  are  undervalued.  The  Fund's  primary  objective  is  capital  appreciation.
  (NO-LOAD)
                                             PORTFOLIO MANAGERS: MARC J. GABELLI
                                                                AND CAESAR BRYAN

GABELLI GOLD FUND---------------------------------------------------------------
Seeks to invest in a global  portfolio of equity  securities  of gold mining and
related  companies.  The Fund's  objective  is long-term  capital  appreciation.
Investment in gold stocks is considered speculative and is affected by a variety
of world-wide economic, financial and political factors. (NO-LOAD)
                                                 PORTFOLIO MANAGER: CAESAR BRYAN

GABELLI INTERNATIONAL GROWTH FUND-----------------------------------------------
Seeks to invest in the equity  securities  of  foreign  issuers  with  long-term
capital   appreciation    potential.    The   Fund   offers   investors   global
diversification. (NO-LOAD)
                                                PORTFOLIO MANAGER:  CAESAR BRYAN

THE SIX FUNDS  ABOVE  INVEST IN  FOREIGN  SECURITIES  WHICH  INVOLVES  RISKS NOT
ORDINARILY  ASSOCIATED WITH INVESTMENTS IN DOMESTIC ISSUES,  INCLUDING  CURRENCY
FLUCTUATION,   ECONOMIC  AND  POLITICAL   RISKS.  THE  FUNDS  LISTED  ABOVE  ARE
DISTRIBUTED BY GABELLI & COMPANY, INC.
- --------------------------------------------------------------------------------

           TO RECEIVE A PROSPECTUS, CALL 1-800-GABELLI (422-3554). THE
            PROSPECTUS GIVES A MORE COMPLETE DESCRIPTION OF THE FUND,
           INCLUDING FEES AND EXPENSES. READ THE PROSPECTUS CAREFULLY
                        BEFORE YOU INVEST OR SEND MONEY.
                              VISIT OUR WEBSITE AT:
                                 WWW.GABELLI.COM
                                    OR, CALL:
                                  1-800-GABELLI
                  1-800-422-3554 [BULLET] 914-921-5100 [BULLET]
                  FAX: 914-921-5118 [BULLET] [email protected]
                    ONE CORPORATE CENTER, RYE, NEW YORK 10580
<PAGE>

                        Gabelli Global Series Funds, Inc.
                       THE GABELLI GLOBAL OPPORTUNITY FUND
                              One Corporate Center
                            Rye, New York 10580-1434
                                  1-800-GABELLI
                                [1-800-422-3554]
                               FAX: 1-914-921-5118
                             HTTP://WWW.GABELLI.COM
                            E-MAIL: [email protected]
                (Net Asset Value may be obtained daily by calling
                         1-800-GABELLI after 6:00 P.M.)

                               BOARD OF DIRECTORS
          Mario J. Gabelli, CFA           Karl Otto Pohl
          CHAIRMAN AND CHIEF              FORMER PRESIDENT
          INVESTMENT OFFICER              DEUTSCHE BUNDESBANK
          GABELLI ASSET MANAGEMENT INC.

          Felix J. Christiana             Werner J. Roeder, MD
          FORMER SENIOR VICE PRESIDENT    MEDICAL DIRECTOR
          DOLLAR DRY DOCK SAVINGS BANK    LAWRENCE HOSPITAL

          Anthony J. Colavita             Anthonie C. van Ekris
          ATTORNEY-AT-LAW                 MANAGING DIRECTOR
          ANTHONY J. COLAVITA, P.C.       BALMAC INTERNATIONAL, INC.

          John D. Gabelli
          SENIOR VICE PRESIDENT
          GABELLI & COMPANY, INC.

                         OFFICERS AND PORTFOLIO MANAGERS
          Mario J. Gabelli, CFA           Marc J. Gabelli
          PRESIDENT AND CHIEF             PORTFOLIO MANAGER
          INVESTMENT OFFICER

          Caesar Bryan                    Bruce N. Alpert
          PORTFOLIO MANAGER               VICE PRESIDENT AND TREASURER

          James E. McKee                  Ivan Arteaga, CFA
          SECRETARY                       ASSOCIATE PORTFOLIO MANAGER

                                   DISTRIBUTOR
                             Gabelli & Company, Inc.

                  CUSTODIAN, TRANSFER AGENT AND DIVIDEND AGENT
                       State Street Bank and Trust Company

                                  LEGAL COUNSEL
                    Skadden, Arps, Slate, Meagher & Flom LLP

- --------------------------------------------------------------------------------
This report is submitted for the general  information of the shareholders of The
Gabelli  Global  Opportunity  Fund. It is not  authorized  for  distribution  to
prospective investors unless preceded or accompanied by an effective prospectus.

- --------------------------------------------------------------------------------
GAB403Q100SR

                                              [Photo of Mario J.Gabelli omitted]

THE
GABELLI
GLOBAL
OPPORTUNITY
FUND


                                                            FIRST QUARTER REPORT
                                                                  MARCH 31, 2000


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