GABELLI GLOBAL SERIES FUNDS INC
N-30D, 2000-03-06
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                               [FLAG GRAPHICS OMITTED]

GABELLI GLOBAL OPPORTUNITY FUND

ANNUAL REPORT
DECEMBER 31, 1999

                                  [PHOTO OF MARC GABELLI & CAESAR BRYAN OMITTED]

                                                MARC J. GABELLI AND CAESAR BRYAN
                                                              PORTFOLIO MANAGERS

TO OUR SHAREHOLDERS,

      Worldwide equity markets rode a wave of prosperity through the fourth
quarter of 1999. Following the lead of the American market indicators,
particularly the Nasdaq Index, markets around the world continued their
rebounds. Europe as a whole is in a good position, as companies and countries on
the continent finally appear to be getting the hang of free-market economic
tactics. Japan is in its best position in years. Emerging markets look strong.
The U.S. economy, which may have some investors worried, remains strong. The
Gabelli Global Opportunity Fund profited from all of these positive dynamics in
1999, posting outstanding returns and leaving itself in a strong position
looking ahead to 2000.

INVESTMENT PERFORMANCE

      For the fourth quarter ended December 31, 1999, The Gabelli Global
Opportunity Fund's (the "Fund") total return was 38.92%. The Lipper Global Fund
Average and Morgan Stanley Capital International World Free Index of global
equity markets had total returns of 23.79% and 17.35% 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 an impressive 79.21% for 1999. The Lipper Global Fund
Average and Morgan Stanley World Free Index rose 36.08% and 26.82%,
respectively, over the same twelve-month period. Since inception on May 11, 1998
through December 31, 1999, the Fund had a cumulative total return of 97.30%,
which equates to an average annual total return of 51.19%.
<PAGE>

INVESTMENT RESULTS (a)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                        Quarter
                                  -----------------------------------------------------
                                    1st           2nd             3rd              4th              Year
                                    ---           ---             ---              ---              ----
<C>    <S>                        <C>           <C>              <C>             <C>               <C>
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)
- ------------------------------------------------------------------------------------------------------------
</TABLE>

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

               Average Annual Returns - December 31, 1999 (a)
               ----------------------------------------------

  1 Year .......................................................  79.21%
  Life of Fund (b) .............................................  51.19%
- --------------------------------------------------------------------------------

                            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.
- --------------------------------------------------------------------------------

            COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN
     THE GABELLI GLOBAL OPPORTUNITY FUND, THE LIPPER GLOBAL FUND AVERAGE AND
                       THE MORGAN STANLEY WORLD FREE INDEX

[Line graph omitted--plot points as follows]

                    GABELLI GLOBAL     LIPPER GLOBAL     MORGAN STANLEY
                   OPPORTUNITY FUND     FUND AVERAGE    WORLD FREE INDEX
      5/11/98          $10,000            $10,000           $10,000
      12/31/98          11,009              9,922            10,613
      12/31/99          19,729             13,459            13,501

* PAST PERFORMANCE IS NOT PREDICTIVE OF FUTURE PERFORMANCE.

                                       2
<PAGE>

OUR INVESTMENT OBJECTIVE

      The Gabelli Global Opportunity Fund seeks to find investment opportunities
globally. We strive to identify stocks that are attractively priced relative to
their intrinsic value. The economies of the world have entered a period of what
we envision to be a long term sustainable growth never experienced during any
other period of history. With the end of the "Cold War" and the transition from
closed to open market economies, the global arena for market opportunities has
expanded and should continue to grow. The continued development of the free
trade zones of North America and South America, Europe, and the Asia Pacific
region should add to this long term expansion.

GLOBAL ALLOCATION

      The accompanying chart presents the Fund's holdings by geographic region
as of December 31, 1999. 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.

                    HOLDINGS BY GEOGRAPHIC REGION - 12/31/99

[Pie chart omitted--plot points as follows]

Europe                        38.9%
United States                 21.0%
Japan                         18.1%
Canada                         5.3%
Asia/Pacific Rim               3.0%
South Africa                   1.1%
Cash                          12.6%

COMMENTARY

      In 1999, multimedia stocks skyrocketed. Every industry group sector in our
portfolio performed well. We did a solid job picking stocks. However, we must
also credit widespread investor recognition of the exceptional prospects for
multimedia businesses and global investing for our success.

      Wireless communications companies stood out during a year in which
virtually every multimedia industry sector contributed to returns. Why did
investors "discover" wireless in 1999? The development of seamless national
networks, better transmission and handset technology, and significantly lower
costs to consumers combined to alert investors to the enormous growth potential
of wireless. We now have Internet access through cellular telephones. In the
future, we will be able to link our personal computers to the Internet via
wireless systems. Ultimately, the "Wireless World" may be even bigger than the
"Wired World" envisioned by Microsoft co-founder and venture capitalist Paul
Allen.

      After several relatively disappointing years, broadcast and publishing
stocks were also stellar performers. Ironically, these "old media" companies are
benefiting substantially from a flood of advertising dollars coming from "new
media" Internet companies, which recognize the best way to build brand
recognition is through radio, television, newspaper, and magazine ads.

      The Fund was also buoyed by much better performance from its Japanese,
Southeast Asian, and Latin American investments,which in recent years have been
restrained by the economic and stock market malaise in their regions and
individual countries. The realistic potential for synchronized global economic
growth should help our international portfolio holdings contribute more
consistently to performance.


                                       3
<PAGE>

      Economic growth is gathering steam in Europe with improvements in various
indicators of both business and consumer confidence. Most pleasing is the
apparent improvement in Germany, the largest European economy and a recent
laggard. The German market was given a shot in the arm at the end of the year
when the Government announced plans to remove the capital gains tax of 50% on
corporate equity holdings. This plan, if it goes into effect, will have a major
impact on the German economy. Following World War II, German banks and insurance
companies financed, and took major stakes in, many large companies. However,
these stakes became static and prevented a reorganization of corporate Germany.
We believe this proposal is a major step forward and will result in an
improvement of the competitive position of the German economy.

      The Euro has now been in existence for one year. Its first year of life
has largely been successful, despite its fall from about $1.18 per euro to just
over $1.00 per euro during the year. This fall has helped improve Euroland's
competitive position and we expect some recovery this year. But, more
importantly, the introduction of the Euro is a necessary step to the creation of
a single market. Companies in Europe are now busily consolidating various
sectors. Merger and acquisition activity in Europe was at record levels in 1999,
and we expect more of the same in 2000. Merger and acquisition activity will
provide a solid support for equity markets.

      For example, the telecommunications sector is likely to consolidate
further. At year-end, Vodafone's hostile bid for Mannesmann was just warming up.
This combination, should it occur, would create the world's largest mobile phone
company. As a result, we expect many of the smaller players in Europe will be
purchased by a handful of larger companies seeking scale. We also expect further
merger activity in many other industry sectors, particularly pharmaceuticals,
media and broadcasting, and financial services.

      Japan is the only major industrialized country that is not experiencing
rising interest rates. This is because their economy remains precariously
positioned despite quite healthy growth earlier in the year. The Bank of Japan
remains concerned that the economy can not withstand higher interest rates and
has therefore committed itself to a near zero percent interest rate policy.

      The Tokyo equity market was a profitable place for investors in 1999, but
strong performance was generated by a fairly narrow group of mostly technology
and telecommunications companies. Valuations in these sectors are stretched, and
for the Japanese market to continue to do well we would expect to see some
broadening in the market.

      Across the board, equity valuations are extended relative to their history
and to bond yields. Markets have little room for disappointment. Although
interest rates have risen, equity markets appear to believe this reflects a
return to normalcy following the Asian meltdown rather than a reaction to higher
inflation. Inflation must continue to behave or central banks will have to
tighten interest rates further. Free trade, global competition and advances in
technology have kept consumer prices in check and labor shortages have appeared.
Pricing in many industries is still very tight - just ask a product manager at a
consumer products company.

      Looking ahead, we will continue to emphasize companies that have some
pricing power, a differential product or franchise and growth potential. With
markets probably experiencing greater


                                       4
<PAGE>

volatility, we believe valuations will become increasingly important. We will
continue to pay close attention to levels of valuation and remain extremely
skeptical of valuations based on multiples of sales closer in number to my age
than my child's. Also, in a more challenging environment, we will remain very
diversified by stock sector and country.

LET'S TALK STOCKS

      The following are stock specifics on selected holdings of our Fund.
Favorable earnings prospects do not necessarily translate into higher stock
prices, but they do express a positive trend which we believe will develop over
time. The share prices of foreign holdings are stated in U.S. dollar equivalent
terms as of December 31, 1999.

BCE INC. (BCE - $90.1875 - NYSE) is Canada's global communications company. BCE
recently completed a major transaction with Ameritech (AIT - $67.1875 - NYSE).
Under the agreement, BCE sold 20% of Bell Canada, its wholly-owned Canadian
telecommunications subsidiary, to Ameritech. BCE also owns strategic stakes in
Nortel Networks (NT - $101.00 - NYSE), Teleglobe (TGO - $22.6875 - NYSE), BCE
Emergis and CGI Group. One share of BCE provides ownership of 0.84 shares of
Nortel Networks. The company's positions in satellites, network operations,
information technology, media and e-commerce are expected to provide growth for
the company.

CANAL + (CNLP.PA - $145.55 - PARIS STOCK EXCHANGE) is Europe's leading pay
television company operating throughout Europe with the exception of the U.K.,
Ireland and Germany. Canal + 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 - $14.1875 - NYSE) provides telecommunications
services and public services to approximately 1.8 million customers in 21
states. Citizens owns 83% of Electric Lightwave (ELIX - $18.75 - Nasdaq), a
competitive local exchange carrier ("CLEC") serving primarily the western U.S.
Last year, management 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 900,000 rural
access lines in 11 states for $2.8 billion. CZN intends to finance the
transactions by divesting its public services operations. It has already
announced the sale of its water operations to American Water Resources for $835
million. The company has sold its 16% stake in Centennial Cellular Corp. for
approximately $205 million. Citizens has monetized its ownership of Century
Communications' (CTYA - $45.625 - Nasdaq) stock and cable operations through a
sale to Adelphia Communications for approximately $220 million.

KDD CORP. (9431.T - $138.59 - TOKYO STOCK EXCHANGE) provides international
telecommunications services in Japan. The company's services include telephone,
telex, circuit leasing, data communications, and data transfer. KDD completed
the JIH (a nationwide fiber-optic network) in the spring of this year,
augmenting the existing fiber-optic network it inherited from its merger with
TWJ, forming the most extensive fiber-optic network in the country. KDD is
reportedly discussing a joint venture with American providers Qwest
Communications and SBC.


                                       5
<PAGE>

JAPAN TELECOM CO. LTD. (9434.T - $40,129.20 - TOKYO STOCK EXCHANGE) provides
domestic long distance telephone and leased line services through its fiber
optic cable network connected to local telephone exchanges owned by Nippon
Telegraph & Telephone and local common carriers. The company also participates
in other telecommunications-related businesses such as cellular telephone
services. British Telecommunications and AT&T have each recently taken a
significant stake in Japan Telecom and Vodafone AirTouch is a partner in its
cellular operations.

MANNESMANN AG (MMN - $243.75 - FRANKFURT STOCK EXCHANGE) is a Germany-based
conglomerate with market leading operations in engineering, automotive, and
telecommunications. Mannesmann has focused on its telecommunications activities
in recent years. Today, it holds majority stakes in two of the top three
European mobile operators, Omnitel in Italy and Mannesmann D2 in Germany. It
also has a 15% stake in SFR, the French mobile operator, and recently won the
fourth mobile license in Austria. As of November, it has a majority stake in
Orange plc. Mannesmann is active in fixed network communications as the 1
competitor in Germany, Italy, France and Austria. The company is currently the
target of a hostile takeover attempt by Vodafone AirTouch, plc.

NINTENDO CO. LTD. (7974.T - $166.19 - TOKYO STOCK EXCHANGE) is best known for
its hand-held game machine called Game Boy. Nintendo is expected to soon
introduce its next generation Game Boy, which is likely to have interactive
capabilities. In addition, the company is also expected to introduce a
replacement for the Nintendo 64 system to be called Dolphin. Nintendo is the
leading electronic games company with a very strong balance sheet and a large
amount of net cash.

OMNIPOINT CORP. (OMPT - $120.625 - NASDAQ) is a leading personal communications
services ("PCS") carrier in the U.S., with licenses covering major metropolitan
areas containing nearly 100 million people. On June 23, 1999, Omnipoint agreed
to be acquired by VoiceStream Wireless (VSTR - $142.3125 - Nasdaq) for 0.825
shares of VoiceStream and $8.00 cash per share of OMPT. The combined company
will have PCS licenses covering about 190 million points of presence ("POPs")
and will become a major PCS carrier.

SONY CORP. (6758.T - $296.57 - TOKYO STOCK EXCHANGE) develops and manufactures
consumer and industrial electronic equipment. The company's products include
audio and video equipment, televisions, displays, semiconductors, electronic
components, computers and computer peripherals, and telecommunication equipment.
Sony will focus on evolving digital network technology in its electronics
business. In July, the Columbia House record and video club subsidiary announced
plans to merge with CDNow. After the merger, Sony will have a 37% stake in the
new company.

TELEPHONE & DATA SYSTEMS INC. (TDS - $126.00 - AMEX) is a diversified
telecommunications company with established cellular and local telephone
operations and a developing personal communications services ("PCS") business.
TDS provides high quality telecommunications services to three million customers
in 35 states. TDS owns 81.1% of United States Cellular Corp. (USM - $100.9375 -
AMEX), the nation's seventh largest cellular telephone company. It also owns
82.4% of Aerial Communications Inc. (AERL - $60.875 - Nasdaq), TDS's PCS
subsidiary which owns the licenses to provide PCS service


                                       6
<PAGE>

in six major trading areas ("MTAs") encompassing approximately 27.6 million
population equivalents. On September 20, 1999, VoiceStream Wireless (VSTR -
$142.3125 - Nasdaq) announced the acquisition of Aerial in a $3.3 billion
transaction. Pro-forma for this acquisition, TDS will own over 36 million shares
of VoiceStream.

TOKYO BROADCASTING SYSTEM INC. (9401.T - $33.87 - TOKYO STOCK EXCHANGE) is a
media company, nationally broadcasting television and radio programs. The
company is active in television program production, film production, recorded
music, and both domestic and international cable television programming. Tokyo
Broadcasting also produces and sells software, videotapes, CD-ROMs, and DVDs.
The company is in the process of launching digital satellite broadcasting in a
joint venture with Sumitomo and is also considering spinning off its radio and
other production divisions.

VIVENDI (EX.PA - $90.30 - PARIS STOCK EXCHANGE) is France's largest
environmental services company, engaged in water purification and distribution,
energy, waste management, construction and communications. The group owns 44% of
Cegetel, France's second largest telecommunications operator. Sales at Cegetel
rose 90% in 1998 to $3.4 billion following the company's launch of long distance
service and the boom in demand for mobile services. Only five percent of sales
are generated in emerging markets.

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].

MULTI-CLASS SHARES

      The Gabelli Global Series Funds, Inc. will begin offering additional
classes of Fund shares in March 2000. For existing shareholders, Class AAA
shares remain no-load. At the same time, however, different types and
combinations of sales charge arrangements for Class A, Class B and Class C
shares are targeted to the needs of particular types of investors. Your Board of
Directors believes that the Fund should be able to provide the distribution
alternatives and investment flexibility provided by other similarly situated
funds that offer multiple classes of shares. We believe that the institution of
multiple classes of shares will enhance the potential for the Fund to attract
additional investors in a manner that could provide additional benefits for all
investors in the Fund. Again, to repeat, the offering of additional classes of
Fund shares will not diminish the ability of existing and future shareholders to
purchase and redeem Class AAA shares at net asset value.


                                       7
<PAGE>

IN CONCLUSION

      Looking back on 1999, it is safe to say that the economy, by all
indicators, was blazing away full speed ahead. Being value investors, however,
we like to point out that although the markets were up, losers outnumbered
winners and the tremendous gains were fueled by a narrow group of outstanding
stocks. There are, therefore, significant numbers of undervalued stocks in the
global markets, and our challenge in 2000 will be to find them. After our
tremendous year in 1999 it would be imprudent if not impossible to predict a
repeat next year. Our investment approach will not change, however, and we feel
confident that we will be able to find stocks with good growth potential selling
at bargain prices. Only time will tell.

      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/ signature                   /s/ signature
                    MARC J. GABELLI                 CAESAR BRYAN
                    Portfolio Manager               Portfolio Manager


                                                    /s/ signature
                                                    IVAN ARTEAGA, CFA
                                                    Associate Portfolio Manager

January 31, 2000

- --------------------------------------------------------------------------------
                                TOP TEN HOLDINGS
                                DECEMBER 31, 1999
                                -----------------
   Invik & Co. AB                              Kyocera Corp.
   Canal +                                     Merrill Lynch & Co.
   Omnipoint Corp.                             Gruppo Editoriale L'Espresso SpA
   KDD Corp.                                   BroadWing Inc.
   Japan Telecom Co. Ltd.                      Citizens Utilities Co.
- --------------------------------------------------------------------------------

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 -- DECEMBER 31, 1999
- --------------------------------------------------------------------------------

                                                                   MARKET
    SHARES                                        COST             VALUE
    ------                                        ----             ------
             COMMON STOCKS -- 83.9%
             AEROSPACE -- 0.1%
     3,002   British Aerospace plc ..........  $    11,071       $    19,878
                                               -----------       -----------
             AUTOMOTIVE -- 0.7%
     2,700   General Motors Corp. ...........      184,985           196,256
                                               -----------       -----------
             BROADCASTING -- 7.3%
     3,650   Audiofina ......................      167,784           275,735
        15   Fuji Television Network Inc. ...       87,312           205,540
    29,800   Granada Group plc ..............      270,491           302,053
    15,000   Mediaset SpA ...................      144,234           233,279
     1,000   Nippon Broadcasting
                System Inc. .................       80,854            87,110
       500   NRJ SA .........................      105,633           344,228
    30,000   Publishing &
                Broadcasting Ltd. ...........      182,322           229,053
     1,000   Spanish Broadcasting
                System Inc.+ ................       20,000            40,250
     7,000   Tokyo Broadcasting
                System Inc. .................      100,702           237,056
                                               -----------       -----------
                                                 1,159,332         1,954,304
                                               -----------       -----------
             BUILDING AND CONSTRUCTION -- 1.1%
    10,300   CRH plc ........................      199,108           221,811
     8,000   Sekisui House Ltd. .............       87,169            70,862
                                               -----------       -----------
                                                   286,277           292,673
                                               -----------       -----------
             BUSINESS SERVICES -- 3.7%
     5,000   Asatsu-DK Inc. .................      149,958           337,673
       150   PubliGroupe SA .................      146,142           148,370
     3,878   Vivendi ........................      243,975           350,138
     2,200   Young & Rubicam Inc. ...........       67,069           155,650
                                               -----------       -----------
                                                   607,144           991,831
                                               -----------       -----------
             CABLE -- 2.7%
     2,000   MediaOne Group Inc.+ ...........      110,287           153,625
     1,750   NTL Inc.+ ......................       70,362           218,312
     5,000   UnitedGlobalCom Inc., Cl. A+ ...       64,063           353,125
                                               -----------       -----------
                                                   244,712           725,062
                                               -----------       -----------
             COMMUNICATIONS EQUIPMENT -- 4.2%
    18,000   Furukawa Electric Co. Ltd. .....      146,739           273,074
     4,300   GN Store Nord A/S ..............      156,645           212,413
     1,000   Mannesmann AG ..................      154,879           243,755
     7,000   Marconi plc ....................       52,374           123,700
     4,900   Telelogic AB+ ..................      170,527           260,320
                                               -----------       -----------
                                                   681,164         1,113,262
                                               -----------       -----------



                                                                   MARKET
    SHARES                                        COST             VALUE
    ------                                        ----             ------
             COMPUTER SOFTWARE AND SERVICES -- 0.7%
     3,000   Aspiro Information AB ..........  $   106,923       $   125,176
     1,000   Korea Thrunet Co. Ltd., Cl. A+ .       18,000            67,875
                                               -----------       -----------
                                                   124,923           193,051
                                               -----------       -----------
             CONSUMER PRODUCTS -- 3.7%
     1,220   Christian Dior SA ..............      173,856           302,296
       100   Compagnie Financiere
                Richemont AG ................      166,456           238,648
     4,000   KAO Corp. ......................       84,729           114,124
     1,000   Nintendo Co. Ltd. ..............      179,962           166,194
     5,000   Sega Enterprises Ltd. ..........      107,221           159,049
                                               -----------       -----------
                                                   712,224           980,311
                                               -----------       -----------
             CONSUMER SERVICES -- 0.3%
     5,000   Rollins Inc.                           85,250            75,000
                                               -----------       -----------
             ELECTRONICS -- 3.6%
     1,500   Kyocera Corp. ..................      154,558           389,057
     1,000   Sony Corp. .....................      130,637           296,565
     1,000   Sony Corp., ADR ................      113,113           284,750
                                               -----------       -----------
                                                   398,308           970,372
                                               -----------       -----------
             ENERGY AND UTILITIES -- 1.0%
     2,000   BP Amoco plc, ADR ..............       93,157           118,625
     2,500   Schlumberger Ltd. ..............      123,096           140,625
       484   Transocean Sedco Forex Inc. ....       14,726            16,305
                                               -----------       -----------
                                                   230,979           275,555
                                               -----------       -----------
             ENTERTAINMENT -- 5.7%
     3,700   Canal Plus .....................      243,995           538,526
     6,088   Liberty Media Group, Cl. A+ ....      118,259           345,494
    50,000   Rank Group plc .................      199,840           159,511
     4,500   Seagram Co. ....................      194,225           202,219
     5,000   USA Networks Inc.+ .............      166,080           276,250
                                               -----------       -----------
                                                   922,399         1,522,000
                                               -----------       -----------
             EQUIPMENT AND SUPPLIES -- 0.8%
     4,000   THK Co. Ltd. ...................       85,116           161,691
     4,000   Toyo Seikan Kaisha Ltd. ........       81,824            57,943
                                               -----------       -----------
                                                   166,940           219,634
                                               -----------       -----------
             FINANCIAL SERVICES -- 11.7%
       800   Allianz AG .....................      271,239           268,734
     2,000   AXA-UAP ........................      285,927           278,807
     2,000   Banque Nationale de Paris ......      168,626           184,528
     3,000   Citigroup Inc. .................      141,195           166,687
     5,000   Invik and Co. AB, Cl. B ........      359,167           593,559
    25,000   Mediolanum SpA .................      200,323           327,356

                 See accompanying notes to financial statements.

                                       9
<PAGE>

THE GABELLI GLOBAL OPPORTUNITY FUND
PORTFOLIO OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 1999
- --------------------------------------------------------------------------------

                                                                   MARKET
    SHARES                                        COST             VALUE
    ------                                        ----             ------
             COMMON STOCKS (Continued)
             FINANCIAL SERVICES (Continued)
     5,000   Mellon Financial Corp. .........  $   173,822       $   170,312
     4,500   Merrill Lynch & Co. Inc. .......      353,912           375,750
       900   Morgan (J.P.) & Co. Inc. .......       91,742           113,962
    17,000   Nikko Securities Co. Ltd. ......      168,537           215,141
    10,000   Prudential plc .................      163,881           197,067
     6,500   Schroders plc ..................      144,491           130,823
    10,000   Skandinaviska Enskilda
                Banken, Cl. A ...............      135,349           101,081
                                               -----------       -----------
                                                 2,658,211         3,123,807
                                               -----------       -----------
             FOOD AND BEVERAGE -- 0.5%
    25,800   Foster's Brewing Group Ltd. ....       69,207            74,018
     5,100   Whitman Corp. ..................       97,736            68,531
                                               -----------       -----------
                                                   166,943           142,549
                                               -----------       -----------
             HEALTH CARE -- 3.1%
       240   Novartis AG ....................      374,805           352,396
        19   Roche Holding AG ...............      226,415           225,523
     3,500   Sanofi Synthelabo SA ...........      161,020           145,739
     8,000   SmithKline Beecham plc .........      111,850           102,087
                                               -----------       -----------
                                                   874,090           825,745
                                               -----------       -----------
             HOTELS AND GAMING -- 0.7%
    13,000   Mirage Resorts Inc.+ ...........      211,425           199,062
                                               -----------       -----------
             METALS AND MINING -- 3.3%
     3,000   Anglogold Ltd., ADR ............       67,525            77,062
    20,000   Antofagasta Holdings plc .......      109,477           140,047
     5,000   Barrick Gold Corp. .............       98,475            88,437
     8,300   Harmony Gold
                Mining Co. Ltd. .............       37,858            53,266
    22,800   Harmony Gold
                Mining Co. Ltd., ADR ........      130,000           143,213
     3,500   Newmont Mining Corp. ...........       74,706            85,750
     6,000   Placer Dome Inc. ...............       75,363            64,500
     2,700   Stillwater Mining Co.+ .........       49,506            86,063
    25,000   WMC Ltd. .......................      115,458           137,865
                                               -----------       -----------
                                                   758,368           876,203
                                               -----------       -----------
             PUBLISHING -- 5.5%
    10,000   Arnoldo Mondadori
                Editore SpA+ ................      157,737           317,284
    32,067   Gruppo Editoriale
                L'Espresso SpA ..............       87,079           371,117
    34,000   Independent News and
                Media plc ...................      160,733           222,945
     7,000   News Corp. Ltd., ADR ...........      202,206           267,750



                                                                   MARKET
    SHARES                                        COST             VALUE
    ------                                        ----             ------
     8,000   Schibsted ASA ..................  $    95,193       $   148,712
    12,000   United News & Media plc ........      122,561           152,937
                                               -----------       -----------
                                                   825,509         1,480,745
                                               -----------       -----------
             RETAIL -- 1.1%
     2,000   Ito Yokado Co. Ltd. ............      135,479           217,285
    25,000   Sagami Co. Ltd. ................       68,443            57,502
     1,000   Tsutsumi Jewelry Co. Ltd .......       27,759            27,405
                                               -----------       -----------
                                                   231,681           302,192
                                               -----------       -----------
             SATELLITE -- 0.9%
     1,600   Societe Europeenne
                des Satellites ..............      239,511           227,236
                                               -----------       -----------
             TELECOMMUNICATIONS -- 16.6%
     3,000   BCE Inc. .......................      147,838           270,563
     3,500   Bell Atlantic Corp. ............      212,725           215,469
    10,000   BroadWing Inc.+ ................      228,313           368,750
     6,250   Cable & Wireless plc, ADR ......      230,134           330,859
    25,180   Citizens Utilities Co., Cl. B+ .      262,793           357,241
        15   DDI Corp. ......................      109,860           205,540
    12,500   Electric Lightwave Inc., Cl. A+       138,000           234,375
     5,125   Global Crossing Ltd.+ ..........       82,313           256,250
        10   Japan Telecom Co. Ltd. .........       93,228           401,292
     2,000   Jazztel plc, ADR+ ..............       34,894           130,250
     3,000   KDD Corp. ......................      206,970           415,778
    15,000   Manitoba Telecom
                Services Inc. ...............      190,152           223,415
        16   Nippon Telegraph &
                Telephone Corp. .............      153,299           274,053
    10,500   Rogers Communications
                Inc., Cl. B, ADR+ ...........      170,881           259,875
     1,500   Telecom Italia SpA, ADR ........      140,318           210,000
     3,714   Telefonica SA, ADR .............      162,549           292,710
                                               -----------       -----------
                                                 2,564,267         4,446,420
                                               -----------       -----------
             WIRELESS COMMUNICATIONS -- 4.9%
     3,500   Omnipoint Corp.+ ...............       62,155           422,188
    30,000   Telecom Italia Mobile
                SpA, ADR ....................      178,389           335,112
     2,300   Telephone & Data
                Systems Inc. ................       86,665           289,800
     7,000   Telesystem International
                Wireless Inc.+ ..............      186,859           257,499
                                               -----------       -----------
                                                   514,068         1,304,599
                                               -----------       -----------
              TOTAL COMMON STOCKS ...........   14,859,781        22,457,747
                                               -----------       -----------

                 See accompanying notes to financial statements.

                                       10
<PAGE>

THE GABELLI GLOBAL OPPORTUNITY FUND
PORTFOLIO OF INVESTMENTS (CONTINUED) -- DECEMBER 31, 1999
- --------------------------------------------------------------------------------
                                                                   MARKET
    SHARES                                        COST             VALUE
    ------                                        ----             ------
             PREFERRED STOCK -- 0.0%
             AEROSPACE -- 0.0%
       948   British Aerospace plc, Pfd. ....  $     1,512       $     1,508
                                               -----------       -----------
 PRINCIPAL
  AMOUNT
 ---------
             U.S. GOVERNMENT OBLIGATIONS -- 12.1%
$3,270,000   U.S. Treasury Bills,
                5.04% to 5.42%++,
                due 01/13/00 to 03/30/00 ....    3,247,370         3,248,000
                                               -----------       -----------
             TOTAL
                INVESTMENTS -- 96.0% ........  $18,108,663        25,707,255
                                               ===========
             OTHER ASSETS AND
                LIABILITIES (NET) -- 4.0% ................         1,071,967
                                                                 -----------
             NET ASSETS -- 100.0%
                (1,485,599 shares outstanding) ...........       $26,779,222
                                                                 ===========
             NET ASSET VALUE,
                OFFERING AND REDEMPTION
                PRICE PER SHARE ..........................            $18.03
                                                                      ======

                                                                    VALUE
                                                                    -----
- ----------------
             For Federal tax purposes:
             Aggregate cost ..............................       $18,108,853
                                                                 ===========
             Gross unrealized appreciation ...............       $ 7,898,450
             Gross unrealized depreciation ...............          (300,048)
                                                                 -----------
             Net unrealized appreciation .................       $ 7,598,402
                                                                 ===========

- ----------------
+     Non-income producing security.
++    Represents annualized yield at date of purchase.
ADR - American Depositary Receipt.

                                              % OF
                                             MARKET                MARKET
GEOGRAPHIC DIVERSIFICATION                    VALUE                VALUE
- --------------------------                   ------             -----------
Europe .................................      38.9%             $10,006,879
North America ..........................      38.9%               9,995,592
Japan ..................................      18.1%               4,654,682
Asia/Pacific Rim .......................       3.0%                 776,561
South Africa ...........................       1.1%                 273,541
                                             -----              -----------
                                             100.0%             $25,707,255
                                             =====              ===========

                 See accompanying notes to financial statements.


                                       11
<PAGE>

                       THE GABELLI GLOBAL OPPORTUNITY FUND

STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 1999
- --------------------------------------------------------------------------------
ASSETS:
    Investments, at value (Cost $18,108,663) .................       $25,707,255
    Cash and foreign currency,
      at value (Cost $1,041,353) .............................         1,082,051
    Dividends, interest and reclaims receivable ..............            10,566
    Receivable for investments sold ..........................           216,000
    Receivable for Fund shares sold ..........................             9,000
    Receivable from adviser ..................................            32,300
    Deferred organizational expenses .........................            26,651
    Other assets .............................................             2,850
                                                                     -----------
    TOTAL ASSETS .............................................        27,086,673
                                                                     -----------
LIABILITIES:
    Payable for investments purchased ........................           146,142
    Payable for investment advisory fees .....................            77,621
    Payable for distribution fees ............................             4,886
    Payable to custodian .....................................             2,400
    Payable to adviser .......................................            40,000
    Other accrued expenses ...................................            36,402
                                                                     -----------
    TOTAL LIABILITIES ........................................           307,451
                                                                     -----------
    NET ASSETS applicable to 1,485,599
      shares outstanding .....................................       $26,779,222
                                                                     ===========
NET ASSETS CONSIST OF:
    Capital stock, at par value ..............................             1,486
    Additional paid-in capital ...............................        19,134,213
    Accumulated net realized gain on investments
      and foreign currency transactions ......................             4,837
    Net unrealized appreciation on investments
      and foreign currency transactions ......................         7,638,686
                                                                     -----------
    TOTAL NET ASSETS .........................................       $26,779,222
                                                                     ===========
    NET ASSET VALUE, offering and redemption
      price per share ($26,779,222 / 1,485,599
      shares outstanding; 200,000,000 shares
      authorized of $0.001 par value) ........................            $18.03
                                                                          ======

STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 1999
- --------------------------------------------------------------------------------
INVESTMENT INCOME:
   Dividends (net of foreign taxes of $10,901) ..............       $   128,214
   Interest .................................................            34,707
                                                                    -----------
   TOTAL INVESTMENT INCOME ..................................           162,921
                                                                    -----------
EXPENSES:
   Investment advisory fees .................................           116,948
   Distribution fees ........................................            29,287
   Legal and audit fees .....................................            18,814
   Custodian fees ...........................................            15,869
   Shareholder communications expenses ......................            15,093
   Registration fees ........................................            12,219
   Organizational expenses ..................................             8,045
   Shareholder services fees ................................             6,716
   Directors' fees ..........................................               481
   Interest expense .........................................             3,868
   Miscellaneous expenses ...................................             3,838
                                                                    -----------
   TOTAL EXPENSES ...........................................           231,178
                                                                    -----------
   Less: Expense reimbursement ..............................          (110,241)
                                                                    -----------
   TOTAL NET EXPENSES .......................................           120,937
                                                                    -----------
   NET INVESTMENT INCOME ....................................            41,984
                                                                    -----------
NET REALIZED AND UNREALIZED GAIN
   ON INVESTMENTS:
   Net realized gain on investments and
      foreign currency transactions .........................         1,126,064
   Net change in unrealized appreciation
      on investments and foreign currency
      transactions ..........................................         7,506,982
                                                                    -----------
   NET REALIZED AND UNREALIZED GAIN
      ON INVESTMENTS AND FOREIGN
      CURRENCY TRANSACTIONS .................................         8,633,046
                                                                    -----------
   NET INCREASE IN NET ASSETS RESULTING
      FROM OPERATIONS .......................................       $ 8,675,030
                                                                    ===========

STATEMENT OF CHANGES IN NET ASSETS
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                                YEAR ENDED          PERIOD ENDED
                                                                             DECEMBER 31, 1999    DECEMBER 31, 1998 +
                                                                             -----------------    -------------------
<S>                                                                             <C>                  <C>
OPERATIONS:
    Net investment income ............................................          $    41,984          $   48,310
    Net realized gain on investments and foreign currency transactions            1,126,064             190,596
    Net change in unrealized appreciation on investments
      and foreign currency transactions ..............................            7,506,982             131,704
                                                                                -----------          ----------
    NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS .............            8,675,030             370,610
                                                                                -----------          ----------
DISTRIBUTIONS TO SHAREHOLDERS:
    Net investment income ............................................                   --             (48,310)
    In excess of net investment income ...............................                   --             (31,596)
    Net realized gain on investments .................................           (1,126,064)           (159,812)
    In excess of net realized gain on investments ....................              (36,335)                 --
                                                                                -----------          -----------
    TOTAL DISTRIBUTIONS TO SHAREHOLDERS ..............................           (1,162,399)           (239,718)
                                                                                -----------          ----------
CAPITAL SHARE TRANSACTIONS:
    Net increase in net assets from capital share transactions .......           13,400,561           5,735,138
                                                                                -----------          ----------
    NET INCREASE IN NET ASSETS .......................................           20,913,192           5,866,030
NET ASSETS:
    Beginning of period ..............................................            5,866,030                  --
                                                                                -----------          ----------
    End of period ....................................................          $26,779,222          $5,866,030
                                                                                ===========          ==========
</TABLE>

- ----------
+     From commencement of investment operations on May 11, 1998 through
      December 31, 1998.

                 See accompanying notes to financial statements.

                                       12
<PAGE>

THE GABELLI GLOBAL OPPORTUNITY FUND
NOTES TO FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------

1. ORGANIZATION. The Gabelli Global Opportunity Fund (the "Fund"), a series of
Gabelli Global Series Funds, Inc. (the "Corporation"), was organized on July 16,
1993 as a Maryland corporation. The Fund is a non-diversified, open-end
management investment company registered under the Investment Company Act of
1940, as amended (the "1940 Act"), and one of four separately managed portfolios
(collectively, the "Portfolios") of the Corporation. The Fund's primary
objective is capital appreciation. The Fund commenced investment operations on
May 11, 1998.

2. SIGNIFICANT ACCOUNTING POLICIES. The preparation of financial statements in
accordance with generally accepted accounting principles requires management to
make estimates and assumptions that affect the reported amounts and disclosures
in the financial statements. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the
Fund in the preparation of its financial statements.

SECURITY VALUATION. Portfolio securities listed or traded on a nationally
recognized securities exchange, quoted by the National Association of Securities
Dealers Automated Quotations, Inc. ("Nasdaq") or traded on foreign exchanges are
valued at the last sale price on that exchange as of the close of business on
the day the securities are being valued (if there were no sales that day, the
security is valued at the average of the closing bid and asked prices or, if
there were no asked prices quoted on that day, then the security is valued at
the closing bid price on that day, except for open short positions, which are
valued at the last asked price). All other portfolio securities for which
over-the-counter market quotations are readily available are valued at the
latest average of the bid and asked prices. Portfolio securities traded on more
than one national securities exchange or market are valued according to the
broadest and most representative market, as determined by Gabelli Funds, LLC
(the "Adviser"). Securities and assets for which market quotations are not
readily available are valued at their fair value as determined in good faith
under procedures established by and under the general supervision of the Board
of Directors. Short term debt securities with remaining maturities of 60 days or
less are valued at amortized cost, unless the Directors determine such does not
reflect the securities' fair value, in which case these securities will be
valued at their fair value as determined by the Directors. Debt instruments
having a maturity greater than 60 days are valued at the highest bid price
obtained from a dealer maintaining an active market in those securities. Options
are valued at the last sale price on the exchange on which they are listed. If
no sales of such options have taken place that day, they will be valued at the
mean between their closing bid and asked prices.

REPURCHASE AGREEMENTS. The Fund may enter into repurchase agreements with
primary government securities dealers recognized by the Federal Reserve Board,
with member banks of the Federal Reserve System or with other brokers or dealers
that meet credit guidelines established by the Directors. Under the terms of a
typical repurchase agreement, the Fund takes possession of an underlying debt
obligation subject to an obligation of the seller to repurchase, and the Fund to
resell, the obligation at an agreed-upon price and time, thereby determining the
yield during the Fund's holding period. The Fund will always receive and
maintain securities as collateral whose market value, including accrued
interest, will be at least equal to 100% of the dollar amount invested by the
Fund in each agreement. The Fund will make payment for such securities only upon
physical delivery or upon evidence of book entry transfer of the collateral to
the account of the custodian. To the extent that any repurchase transaction
exceeds one business day, the value of the collateral is marked-to-market on a
daily basis to maintain the adequacy of the collateral. If the seller defaults
and the value of the collateral declines or if bankruptcy proceedings are
commenced with respect to the seller of the security, realization of the
collateral by the Fund may be delayed or limited.


                                       13
<PAGE>

THE GABELLI GLOBAL OPPORTUNITY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

FORWARD FOREIGN EXCHANGE CONTRACTS. The Fund may engage in forward foreign
exchange contracts for hedging a specific transaction with respect to either the
currency in which the transaction is denominated or another currency as deemed
appropriate by the Adviser. Forward foreign exchange contracts are valued at the
forward rate and are marked-to-market daily. The change in market value is
included in unrealized appreciation/depreciation on investments and foreign
currency transactions. When the contract is closed, the Fund records a realized
gain or loss equal to the difference between the value of the contract at the
time it was opened and the value at the time it was closed.

The use of forward foreign exchange contracts does not eliminate fluctuations in
the underlying prices of the Fund's portfolio securities, but it does establish
a rate of exchange that can be achieved in the future. Although forward foreign
exchange contracts limit the risk of loss due to a decline in the value of the
hedged currency, they also limit any potential gain/(loss) that might result
should the value of the currency increase. In addition, the Fund could be
exposed to risks if the counterparties to the contracts are unable to meet the
terms of their contracts.

FOREIGN CURRENCY TRANSLATION. The books and records of the Fund are maintained
in United States (U.S.) dollars. Foreign currencies, investments and other
assets and liabilities are translated into U.S. dollars at the exchange rates
prevailing at the end of the period, and purchases and sales of investment
securities, income and expenses are translated at the exchange rate prevailing
on the respective dates of such transactions. Unrealized gains and losses, which
result from changes in foreign exchange rates and/or changes in market prices of
securities, have been included in unrealized appreciation/depreciation on
investments and foreign currency transactions. Net realized foreign currency
gains and losses resulting from changes in exchange rates include foreign
currency gains and losses between trade date and settlement date on investment
securities transactions, foreign currency transactions and the difference
between the amounts of interest and dividends recorded on the books of the Fund
and the amounts actually received. The portion of foreign currency gains and
losses related to fluctuation in exchange rates between the initial trade date
and subsequent sale trade date is included in realized gain/(loss) on
investments.

SECURITIES TRANSACTIONS AND INVESTMENT INCOME. Securities transactions are
accounted for on the trade date with realized gain or loss on investments
determined by using the identified cost method. Interest income (including
amortization of premium and accretion of discount) is recorded as earned.
Dividend income is recorded on the ex-dividend date.

DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS. Dividends and distributions to
shareholders are recorded on the ex-dividend date. Income distributions and
capital gain distributions are determined in accordance with income tax
regulations which may differ from generally accepted accounting principles.
These differences are primarily due to differing treatments of income and gains
on various investment securities held by the Fund, timing differences and
differing characterization of distributions made by the Fund.

For the year ended December 31, 1999, reclassifications were made to decrease
accumulated undistributed net investment income for $42,693 with an offsetting
adjustment to accumulated undistributed net realized gain on investments and
foreign currency transactions.


                                       14
<PAGE>

The Gabelli Global Opportunity Fund
Notes to Financial Statements (Continued)
================================================================================

EXPENSES. Certain administrative expenses are common to, and allocated among,
the Portfolios. Such allocations are made on the basis of each Portfolio's
average net assets or other criteria directly affecting the expenses as
determined by the Adviser.

PROVISION FOR INCOME TAXES. The Fund intends to continue to qualify as a
regulated investment company under Subchapter M of the Internal Revenue Code of
1986, as amended. As a result, a Federal income tax provision is not required.

Dividends and interest from non-U.S. sources received by the Fund are generally
subject to non-U.S. withholding taxes at rates ranging up to 30%. Such
withholding taxes may be reduced or eliminated under the terms of applicable
U.S. income tax treaties, and the Fund intends to undertake any procedural steps
required to claim the benefits of such treaties. If the value of more than 50%
of the Fund's total assets at the close of any taxable year consists of stocks
or securities of non-U.S. corporations, the Fund is permitted and may elect to
treat any non-U.S. taxes paid by it as paid by its shareholders.

3. INVESTMENT ADVISORY AGREEMENT. The Fund has entered into an investment
advisory agreement (the "Advisory Agreement") with the Adviser which provides
that the Fund will pay the Adviser a fee, computed daily and paid monthly, at
the annual rate of 1.00% of the value of the Fund's average daily net assets. In
accordance with the Advisory Agreement, the Adviser provides a continuous
investment program for the Fund's portfolio, oversees the administration of all
aspects of the Fund's business and affairs and pays the compensation of all
Officers and Directors of the Fund who are its affiliates. The Adviser
voluntarily agreed to reimburse expenses of the Fund to the extent necessary to
maintain the annualized total operating expenses of the Fund (exclusive of
interest expense) at 1.00% of the value of the Fund's average daily net assets.
For the year ended December 31, 1999, the Adviser reimbursed the Fund in the
amount of $110,241.

4. DISTRIBUTION PLAN. The Fund's Board of Directors has adopted a distribution
plan (the "Plan") pursuant to Rule 12b-1 under the 1940 Act. For the year ended
December 31, 1999, the Fund incurred distribution costs payable to Gabelli &
Company, Inc., an affiliate of the Adviser, of $29,287, or 0.25% of average
daily net assets, the annual limitation under the Plan. Such payments are
accrued daily and paid monthly.

5. ORGANIZATIONAL EXPENSES. The organizational expenses of the Fund are being
amortized on a straight-line basis over a period of 60 months.

6. PORTFOLIO SECURITIES. Purchases and sales of securities for the year ended
December 31, 1999, other than short term securities, aggregated $13,775,200 and
$5,243,181, respectively.

7. TRANSACTIONS WITH AFFILIATES. During the year ended December 31, 1999, the
Fund paid brokerage commissions of $445 to Gabelli & Company, Inc. and its
affiliates.


                                       15
<PAGE>

THE GABELLI GLOBAL OPPORTUNITY FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------

8. LINE OF CREDIT. The Fund has access to an unsecured line of credit up to
$25,000,000 from the custodian for temporary borrowing purposes. Borrowings
under this arrangement bear interest at 0.75% above the Federal Funds rate on
outstanding balances. There were no borrowings outstanding at December 31, 1999.

The average daily amount of borrowings outstanding within the year ended
December 31, 1999 was $588,953, with a related weighted average interest rate of
5.49%. The maximum amount borrowed at any time during the year ended December
31, 1999 was $720,000.

9. CAPITAL STOCK TRANSACTIONS. Transactions in shares of capital stock were as
follows:

<TABLE>
<CAPTION>
                                                        YEAR ENDED                   PERIOD ENDED
                                                     DECEMBER 31, 1999             DECEMBER 31, 1998
                                               ----------------------------   ----------------------------
                                                  SHARES          AMOUNT          SHARES          AMOUNT
                                               ------------    ------------   ------------    ------------
<S>                                               <C>          <C>              <C>           <C>
Shares sold ................................      1,044,063    $14,882,079       2,576,620    $ 26,801,277
Shares issued upon reinvestment of dividends         64,561      1,128,468          22,028         227,773
Shares redeemed ............................       (179,073)    (2,609,986)     (2,042,600)    (21,293,912)
                                               ------------    -----------    ------------    ------------
      Net increase .........................        929,551    $13,400,561         556,048    $  5,735,138
                                               ============    ===========    ============    ============
</TABLE>

10. NEW SHARE CLASSES. On December 7, 1998, the Board of Directors of the Fund
approved a Rule 18f-3 Multi-Class Plan relating to the creation of three
additional classes of shares of the Fund - Class A Shares, Class B Shares and
Class C Shares (the "New Share Classes"). The existing class of shares was
redesignated as Class AAA Shares. In addition, the Board had also approved an
Amended and Restated Distribution Agreement. Rule 12b-1 plans for each of the
New Share Classes and an Amended and Restated Plan of Distribution for the
existing class of shares (Class AAA Shares) to be effective upon the
commencement of the offering of the New Share Classes. On July 22, 1999,
shareholder approval permitting the Fund to offer additional classes of shares
was attained. The New Share Classes are currently not being offered to the
public.


                                       16
<PAGE>

THE GABELLI GLOBAL OPPORTUNITY FUND
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------

Selected data for a share of capital stock outstanding throughout each period.

<TABLE>
<CAPTION>
                                                               YEAR ENDED          PERIOD ENDED
                                                            DECEMBER 31, 1999   DECEMBER 31, 1998+
                                                            -----------------   ------------------
<S>                                                            <C>                  <C>
OPERATING PERFORMANCE:
     Net asset value, beginning of period ...............      $    10.55           $    10.00
                                                               ----------           ----------
     Net investment income ..............................            0.03                 0.09
     Net realized and unrealized gain on investments ....            8.30                 0.91
                                                               ----------           ----------
     Total from investment operations ...................            8.33                 1.00
                                                               ----------           ----------
DISTRIBUTIONS TO SHAREHOLDERS:
     Net investment income ..............................              --                (0.09)
     In excess of net investment income .................              --                (0.06)
     Net realized gain on investments ...................           (0.82)               (0.30)
     In excess of net realized gain on investments ......           (0.03)                  --
                                                               ----------           ----------
     Total distributions ................................           (0.85)               (0.45)
                                                               ----------           ----------
     NET ASSET VALUE, END OF PERIOD .....................      $    18.03           $    10.55
                                                               ==========           ==========
     Total return++ .....................................           79.2%                10.1%
                                                               ==========           ==========
RATIOS TO AVERAGE NET ASSETS AND SUPPLEMENTAL DATA:
     Net assets, end of period (in 000's) ...............      $   26,779           $    5,866
     Ratio of net investment income to average net assets           0.36%                1.72%(a)
     Ratio of operating expenses
          to average net assets before reimbursement (b)            1.97%                4.77%(a)
     Ratio of operating expenses
          to average net assets net of reimbursement ....           1.03%(c)             1.00%(a)
     Portfolio turnover rate ............................             49%                 127%
</TABLE>

- ----------
+     From commencement of investment operations on May 11, 1998 through
      December 31, 1998.
++    Total return represents aggregate total return of a hypothetical $1,000
      investment at the beginning of the period and sold at the end of the
      period including reinvestment of dividends. Total return for the period of
      less than one year is not annualized.
(a)   Annualized.
(b)   During the period ended December 31, 1998 and 1999, the Adviser
      voluntarily reimbursed certain expenses. If such expense reimbursement had
      not occurred, the ratio of operating expenses to average net assets would
      have been as shown.
(c)   The Fund incurred interest expense during the year ended December 31,
      1999. If interest expense had not been incurred, the ratio of operating
      expenses to average net assets net of reimbursement would have been 1.00%.

                 See accompanying notes to financial statements.


                                       17
<PAGE>

THE GABELLI GLOBAL OPPORTUNITY FUND
REPORT OF GRANT THORNTON LLP, INDEPENDENT AUDITORS
- --------------------------------------------------------------------------------

Shareholders and Board of Directors of
The Gabelli Global Opportunity Fund

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of The Gabelli Global Opportunity Fund (one of the
series constituting Gabelli Global Series Funds, Inc.) as of December 31, 1999,
the related statement of operations for the year then ended, the statements of
changes in net assets for the year ended December 31, 1999 and for the period
from May 11, 1998 (commencement of operations) to December 31, 1998 and
financial highlights for each of the periods presented. These financial
statements and financial highlights are the responsibility of the Fund's
management. Our responsibility is to express an opinion on these financial
statements and financial highlights based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the United States. Those standards require that we plan and perform the audit
to obtain reasonable assurance about whether the financial statements and
financial highlights are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. Our procedures included confirmation of securities
owned as of December 31, 1999 by correspondence with the custodian. 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 audit provides a reasonable basis for our
opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of The
Gabelli Global Opportunity Fund of Gabelli Global Series Funds, Inc. at December
31, 1999, and the results of its operations, the changes in its net assets and
the financial highlights for the respective stated periods, in conformity with
accounting principles generally accepted in the United States.

New York, New York
February 11, 2000                            /s/ Signature
                                             Grant Thornton LLP

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                   1999 TAX NOTICE TO SHAREHOLDERS (Unaudited)

For the fiscal year ended December 31, 1999, the Fund paid to shareholders, on
December 27, 1999, an ordinary income dividend (comprised of short term capital
gains) totaling $0.73 per share and long term capital gains totaling $0.12 per
share. For the fiscal year ended December 31, 1999, 9.48% of the ordinary income
dividend qualifies for the dividend received deduction available to
corporations.

U.S. GOVERNMENT INCOME:

The percentage of the ordinary income dividend paid by the Fund during fiscal
year 1999 which was derived from U.S. Treasury securities was 3.35%. Such income
is exempt from state and local tax in all states. However, many states,
including New York and California, allow a tax exemption for a portion of the
income earned only if a mutual fund has invested at least 50% of its assets at
the end of each quarter of the Fund's fiscal year in U.S. Government securities.
The Gabelli Global Opportunity Fund did not meet this strict requirement in
1999. Due to the diversity in state and local tax law, it is recommended that
you consult your personal tax advisor as to the applicability of the information
provided to your specific situation.
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                                       18
<PAGE>

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                             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
SECRETARY

                                   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.
- --------------------------------------------------------------------------------
GAB403Q499SR

                                                [PHOTO OF MARIO GABELLI OMITTED]

THE
GABELLI
GLOBAL
OPPORTUNITY
FUND

                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 1999


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