GABELLI GROWTH FUND
N-30D, 1999-03-11
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                            THE GABELLI GROWTH FUND

                                 ANNUAL REPORT
                               DECEMBER 31, 1998

 Morningstar rating(TM) of The Gabelli Growth Fund was 5 stars overall and for
 the three year period ended 12/31/98 among 2802 domestic equity funds, and for
    the five and ten year periods ended 12/31/98 among 1702 and 732 domestic
                          equity funds, respectively.

                                 [PHOTO]
                                Howard Ward

TO OUR SHAREHOLDERS,

     The fourth quarter of 1998 was full of nostalgia. In the political arena,
Senator John Glenn climbed back into the cockpit of a rocket and circled the
globe with the greatest of ease. Princeton's favorite Tiger, Bill Bradley,
re-launched his political career by announcing a run for the White House. Should
he ultimately win his party's nomination, he may face a Bush or a Dole, although
now it is Junior and the Mrs. Then there was Operation Desert Fox, the sequel to
Operation Desert Storm. Sequels are never as good as originals.

     In sports, we had the New York Jets, in their retro uniforms, return to
glory under the command of good old Bill "The Tuna" Parcells. Dan Reeves, coach
of the Atlanta Falcons, is back at the top of his game, returning to the Super
Bowl for the first time in 10 years. And then there was Doug Flutie's
magnificent return to the NFL. How can anybody not like this man? Of course,
speaking of comebacks, consider Major League Baseball. Excited by the home run
derby between Mark McGwire and Sammy Sosa, baseball experienced a revival of
sorts. Even Marv Albert is back on the air with his biting commentary.

- -------------------------------------------------------------------------------
PAST PERFORMANCE IS NO GUARANTEE OF FUTURE RESULTS. Morningstar proprietary
ratings reflect historical risk adjusted performance as of December 31, 1998
and are subject to change every month. Morningstar ratings are calculated from
a Fund's three, five and ten year average annual returns in excess of 90-day
T-Bill returns with appropriate fee adjustments and a risk factor that reflects
fund performance below 90-day T-Bill returns. The top 10% of the funds in an
investment category receive five stars, the next 22.5% receive four stars, the
next 35% receive three stars, the next 22.5% receive two stars and the bottom
10% receive one star.


<PAGE>



INVESTMENT RESULTS (a)
<TABLE>
<CAPTION>
                                                           Quarter
                                       ----------------------------------------------
                                        1st        2nd           3rd          4th             Year
                                       ------    ------         ------       ------           ------
<S>                                   <C>         <C>          <C>           <C>             <C>
  1998: Net Asset Value.............   $32.32     $33.37        $28.54        $35.40          $35.40
        Total Return................    12.9%       3.2%        (14.5)%        30.2%           29.8%
- -------------------------------------------------------------------------------------------------------------------
  1997: Net Asset Value.............   $24.50     $29.25        $33.41        $28.63          $28.63
        Total Return................     1.5%      19.4%         14.2%          3.1%           42.6%
- -------------------------------------------------------------------------------------------------------------------
  1996: Net Asset Value.............   $23.75     $24.34        $25.35        $24.14          $24.14
        Total Return................     7.2%       2.5%          4.1%          4.4%           19.4%
- -------------------------------------------------------------------------------------------------------------------
  1995: Net Asset Value.............   $20.86     $22.99        $24.91        $22.16          $22.16
        Total Return................     6.0%      10.2%          8.4%          4.9%           32.7%
- -------------------------------------------------------------------------------------------------------------------
  1994: Net Asset Value.............   $21.90     $21.23        $22.58        $19.68          $19.68
        Total Return................    (5.8)%     (3.1)%         6.4%         (0.5)%          (3.4)%
- -------------------------------------------------------------------------------------------------------------------
  1993: Net Asset Value.............   $21.71     $21.84        $23.43        $23.26          $23.26
        Total Return................     0.6%       0.6%          7.3%          2.5%           11.3%
- -------------------------------------------------------------------------------------------------------------------
  1992: Net Asset Value.............   $20.27     $19.72        $20.50        $21.59          $21.59
        Total Return................    (4.7)%     (2.7)%         4.0%          8.5%            4.5%
- -------------------------------------------------------------------------------------------------------------------
  1991: Net Asset Value.............   $18.18     $18.02        $19.51        $21.28          $21.28
        Total Return................    11.7%      (0.9)%         8.3%         12.0%           34.3%
- -------------------------------------------------------------------------------------------------------------------
  1990: Net Asset Value.............   $16.74     $17.80        $15.75        $16.27          $16.27
        Total Return................    (1.9)%      6.3%        (11.5)%         6.2%           (2.0)%
- -------------------------------------------------------------------------------------------------------------------
  1989: Net Asset Value.............   $13.99     $15.73        $17.46        $17.07          $17.07
        Total Return................    10.6%      12.4%         11.0%          1.5%           40.1%
- -------------------------------------------------------------------------------------------------------------------
  1988: Net Asset Value.............   $10.87     $12.40        $12.71        $12.65          $12.65
        Total Return................    16.1%      14.1%          2.5%          2.5%           39.2%
- -------------------------------------------------------------------------------------------------------------------
  1987: Net Asset Value.............       --     $10.84        $11.28         $9.51           $9.51
        Total Return................       --       8.4%(b)       4.1%        (15.7)%          (4.9)%(b)
- -------------------------------------------------------------------------------------------------------------------
</TABLE>



Average Annual Returns - December 31, 1998 (a)
- ----------------------------------------------
  1   Year ......................... 29.8%
  5   Year ......................... 23.2%
  10  Year ......................... 19.8%
  Life of Fund (b) ................. 19.4%



                        Dividend History
- ---------------------------------------------------------------------

Payment (ex) Date          Rate Per Share          Reinvestment Price
- -----------------          --------------          ------------------
December 28, 1998             $1.745                     $35.15
December 30, 1997             $5.790                     $28.58
December 31, 1996             $2.324                     $24.14
December 29, 1995             $3.960                     $22.16
December 30, 1994             $2.790                     $19.68
December 31, 1993             $0.760                     $23.26
December 31, 1992             $0.646                     $21.59
December 31, 1991             $0.573                     $21.28
December 31, 1990             $0.460                     $16.27
December 29, 1989             $0.654                     $17.07
December 30, 1988             $0.377                     $12.65
January 4, 1988               $0.152                      $9.58



(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 April 10,
1987.

                                       2

<PAGE>


            COMPARISON OF CHANGE IN VALUE OF A $10,000 INVESTMENT IN
                 THE GABELLI GROWTH FUND AND THE S&P 500 INDEX
                                    [GRAPH]



     Popular culture looked back to the future as well. Bell bottom pants are
in - sort of. The Volkswagen Beetle is back although now the engine is in the
front. Tom Wolfe of Bonfire of the Vanities fame finally finished his new tome,
A Man In Full. War movies are back, led by Saving Private Ryan. Tom Brokaw is
right. The men and women who served and supported freedom in World War II were
of special character. We worry about the Dow, they worried about surviving.
They are the Greatest Generation. My father served as a captain in the U.S.
Army in the European theater during the war. My father-in-law served as a
Captain in the U.S. Navy in the North Atlantic and North Sea. My mother's
brother was a lieutenant in the Navy and served on a destroyer in the South
Pacific. There are many families like ours, where men and women served and
returned home without serious injury. We have nothing but compassion for the
families that were less fortunate. We salute all of you that have served our
country in uniform, whether in Europe, the South Pacific, Korea, Vietnam,
Grenada, Panama or, more recently, the Middle East.

     While 1998 will be remembered as the year the masses discovered the
Internet, it was also a year when some of America's original blue chip
companies reasserted themselves in the marketplace and in the stock market.
Congratulations to IBM (and Lou Gerstner) for its success in services,
electronic commerce and personal computers. The quick improvement of fortunes
at AT&T is the work of Michael Armstrong as he has single-handedly turned that
battleship around. Impressive. Finally, Apple is back. With the return of Steve
Jobs, Apple launched the iMAC personal computer and it quickly became the best
selling PC in the market. It is difficult for an analyst to quantify the value
of a Lou Gerstner, Michael Armstrong or Steve Jobs, but they are clearly
valuable assets and special people.



                                       3

<PAGE>


INVESTMENT PERFORMANCE

     For the fourth quarter ended December 31, 1998, The Gabelli Growth Fund's
(the "Fund") total return was 30.2%. The Lipper Analytical Services Growth Fund
Average and Standard and Poor's ("S&P") 500 Index had returns of 22.6% and
21.4%, respectively, over the same period. Each index is an unmanaged indicator
of investment performance. The Fund was up 29.8% for 1998. The Lipper Growth
Fund Average and S&P 500 rose 22.9% and 28.7%, respectively, over the same
twelve month period.

     For the ten year period ended December 31, 1998, the Fund's total return
averaged 19.8% annually versus average annual total returns of 16.7% and 19.2%
for the Lipper Growth Fund Average and S&P 500, respectively. Since inception on
April 10, 1987 through December 31, 1998, the Fund had a cumulative total return
of 704.3%, which equates to an average annual return of 19.4%. Our direct
shareholders total 62,843 and net assets are $1.865 billion as of December 31,
1998.

ECONOMIC BACKGROUND

     Federal Reserve Board Chairman Alan Greenspan's three quick interest rate
easing moves, all within a two month span, worked magic on the psychology of the
markets and the economy by stimulating borrowing, lending and risk taking. We
appear to have dodged the feared recession. We are enjoying the lowest
unemployment rate since 1970. Simultaneously, we have the lowest interest rates
since 1967. This is not supposed to happen. Keynesian economists believe in
something called the Phillips Curve: the Phillips Curve says there is an inverse
relationship between unemployment and inflation. It states that inflation should
rise as unemployment falls. For years, Arthur Laffer, a supply side economist,
has said this is not true. Right now, he looks pretty smart.

     As of January 1, 1999, the current U.S. economic expansion set a postwar
peacetime record of 93 months. The U.S. economy is continuing to grow at a real
Gross Domestic Product ("GDP") rate of 2.0% or better. The information and
technology industries are the engines of growth as the more cyclical basic
industry and manufacturing sectors contract somewhat. According to Business Week
magazine, 37% of new jobs in 1998 came from information related service
industries, versus 15% just three years ago. Problems include Asia and Latin
America which are likely to crimp U.S. exports. Capital spending may slow as
well, given some softness in utilization rates. On a more positive note,
consumers taking advantage of lower interest rates to refinance mortgages have
more cash in their pockets. Furthermore, we might see Congress cut taxes this
year due to the rising budget surplus - another plus for consumers. Finally,
there is an outside chance that interest rates could decline further, given the
lack of inflation and reduced levels of government debt issuance. With near
record low unemployment, low mortgage rates, a possible tax cut and some shot at
still lower interest rates, consumers will keep spending. Since consumer
spending represents two-thirds of GDP, we caution against being too negative on
the subject of economic growth in 1999, at least in the U.S.


                                       4
<PAGE>

THE STOCK MARKET

     The NBA players were locked out this Fall and nobody noticed. Basketball
fans discovered the stock market. They had so much fun investing online in AOL,
Amazon.com, and E-Bay that Patrick Ewing may need a Visa card to get into the
Garden. The action is at the corner of Broad and Wall, home of the New York
Stock Exchange, and not at 34th and Eighth Avenue, home of Madison Square
Garden. Michael Jordan decided investing online was easier than banging the
boards with The Mailman (e-mailman?). He retired. Indeed, the S&P 500 has
compounded at approximately a 30% rate over the last four years (The Gabelli
Growth Fund did a little better). Why work? Who needs a job? Of course, it is a
market of stocks and most mutual funds fared worse than the popular averages.
All stocks are not created equal. The high returns have generally been the
exclusive domain of the domestic, large cap growth stocks. This will not always
be the case. There is a cyclicality to returns that has been absent of late. It
may be hard to believe at this juncture, but there are years when value
investors outperform growth investors. Sometimes, small caps beat large caps. We
even feel compelled to confess that we have seen years when foreign stocks beat
our dollar denominated friends. Stranger things have happened.

     Some people regard the excitement over Internet stocks as strange. In
reality, the Internet stocks represent a speculative bubble. It is a classic
mania. They happen every so often and this is a wild one that has gone farther
than most. It has the look and feel of the "Nifty Fifty" era which peaked in
1972. The glamorous growth stocks of that era included IBM, Xerox, Polaroid,
Eastman Kodak and Avon Products. It took a period of years for some of those
stocks to reach new highs after peaking in 1972 (and losing much of their market
value during 1973 and 1974). In a few cases, it took over twenty years. The
"Nifty Nets", as some refer to them, represent the latest Gold Rush. In my
opinion, some of last year's hot Internet Initial Public Offerings ("IPOs") are
highly flammable.

     Obviously, we believe valuations matter. We expect a number of Internet
stocks to blow up. This will have an impact on the technology sector at large
but may not doom the overall market. In the time line of history this is a sweet
spot for investors. Just as inflation encourages spending, lack of inflation
stimulates saving. We have savings galore thanks to aging baby boomers who are
earning more and spending less (regardless of what the poorly constructed
government statistics say). This new and large class of capitalists have become
stock market wise having grown up with the bull market that really started in
August of 1982.

     Helping to fuel the ongoing rally is corporate prosperity. After all,
earnings drive share prices. This record breaking peacetime expansion is being
aided by the technology revolution. No company has been more prosperous than
Microsoft, the leader of the revolution, which is now the most valuable company
in the world in stock market terms. Leading technology companies sell products
that allow other companies to be more productive. This process enriches the
buyer, the seller and both sets of shareholders. The robust stock price
performance of many technology companies last year was no random walk. The
leaders like Microsoft, Cisco Systems, Lucent Technologies, IBM and Intel are
like

                                       5
<PAGE>


300 pound offensive linemen. This is the business equivalent of power football.
Good luck pushing these behemoths off the line of scrimmage. Importantly, the
emergence of global markets enhances the story further. These markets are
massive (292 million people in the European Union vs. 268 million in the U.S.)
and rich with opportunity. American companies, not just technology companies,
are more than well represented among the leaders. The belt popping waistlines
of the 300 pound linemen act like an expanding cushion to the popular stock
market averages such as the S&P 500.

     Support for stocks can also be found in the record level of mergers and
acquisitions in 1998. Apparently, big is in. You need size to compete in a
world of power football. Announced deals worldwide hit $2.5 trillion in 1998,
up 54% from 1997. In the U.S., announced deals reached $1.6 trillion, an
increase of 78% from the previous year. If you want global reach, clout with
your suppliers and customers and want to jump-start your earnings, merge. No
one is too big to buy at this point. Last year's announced mega-mergers
included Exxon and Mobil, Citicorp and Travelers, NationsBank and BankAmerica,
Daimler Benz and Chrysler, British Petroleum and Amoco, Bell Atlantic and GTE,
AT&T and Tele-Communications Inc., SBC Communications and Ameritech, Norwest
and Wells Fargo and BancOne and First Chicago NBD. The Fortune 500 is about to
become the Fortune 5. Were it not for that long forgotten third quarter market
meltdown, IPOs would have set a record too. As it was, IPOs raised about $35
billion, 10% below 1997's $39 billion rate and 29% below the 1996 record of
$49.5 billion. It looks like the investment bankers can still put steak on the
table. There was no shortage of liquidity for stocks last year.

PORTFOLIO HIGHLIGHTS

     The fourth quarter was wild. We aggressively moved to take advantage of
depressed technology stock prices early in the quarter. Significant additions
were made to existing holdings of Microsoft, Cisco Systems, Lucent Technologies,
Intel, EMC and Dell Computer. What's more, we initiated important new
commitments in IBM and Texas Instruments. Our weighting in pure technology
stocks rose from 17% on September 30, 1998 to 25% by year's end. That is our
self-imposed maximum limit. Outside of technology, we materially increased
holdings of Clear Channel Communications, Rite Aid and Wal-Mart. Other new
holdings of meaningful size were Time Warner (entertainment), Omnicom Group
(advertising) and Infinity Broadcasting (the radio and outdoor display business
of CBS).

     Purchases were funded with the outright sales of Schering Plough (a huge
winner), Computer Associates (a modest winner) and our oil service shares
(mostly unprofitable). A number of partial sales were arranged as we took some
profits from Gillette, Johnson & Johnson, Eli Lilly, Merck, McGraw-Hill and
Walgreen. We also trimmed some Tellabs, which rose 72% during the quarter.

     The Fund's strong quarterly performance was powered by holdings such as
Charles Schwab (+114%), Tellabs (+72%), Tiffany (+65%), Lowe's (+61%), Lucent
Technologies (+59%) and Home Depot (+55%). We must also credit Cisco Systems
(+50%), Wal-Mart (+49%), EMC (+48%), Interpublic Group (+48%), Bank of New York
(+47%), Merrill Lynch (+41%), PepsiCo (+39%) and Intel (+38%). No one was more
surprised at the magnitude of the market's quarterly melt-up than I. Luckily, we
were ready for it and participated fully.


                                       6

<PAGE>


LOOKING AHEAD

     This Wall Street soap opera, known as the bull market, has outlasted
Dallas, Dynasty and Seinfeld. No one knows how or when the last episode is
going to air. The market pundits have been so wrong for so long that they are a
tragedy of comic proportions. Listen to them at your peril.

     What we do know is that stocks are not cheap and we should temper our
expectations. Earnings are growing for most of the service sector but less so
for manufacturing and basic industry companies. In this market of stocks, can
the muscle bound Microsofts and General Electrics continue to pull the averages
higher? Maybe. Would we be surprised to see the market run out of steam this
year? No. However, we continue to caution against timing the market. The market
may remain high and "extended" for a long time.

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.

Cisco Systems Inc. (CSCO - $92.8125 - Nasdaq) is the undisputed leader in data
networking equipment. As such, it is one of the primary beneficiaries of the
growth in Local Area Networks ("LANs"), Wide Area Networks ("WANs") and the
Internet.

The Home Depot Inc. (HD - $61.1875 - NYSE) is the undisputed leader of the home
improvement warehouse retailers. Led by Bernie Marcus and Arthur Blank, the
company's founders, Home Depot is testing new store formats which appeal to new
markets (smaller stores and upscale furnishings), providing incremental growth
to what remains a terrific franchise in do-it-yourself home hardware and
supplies. Geographic expansion continues to drive square footage growth as the
company increases its presence in the Midwest and continues to penetrate the
Northeast. Home Depot has substantial international potential over the long
term. The company plans to offer on-line shopping as soon as possible.

Marsh & McLennan Companies Inc. (MMC - $58.4375 - NYSE), with the acquisitions
of Johnson and Higgins and Sedgewick, holds the number one position in insurance
brokerage. Additionally, the company owns The Putnam Group, the Boston-based
asset manager (assets under management exceed $225 billion), and Mercer Group, a
leader in employee benefits consulting.

Lucent Technologies Inc. (LU - $110.00 - NYSE) was formerly the research arm of
AT&T and known as Bell Labs. AT&T spun-off Bell Labs in 1996 under the Lucent
name. The company is a leader in providing voice networking equipment and is
strengthening its data networking prospects with the recent announcement to
acquire Ascend Communications. The company is benefiting from the strong growth
in network traffic capacity requirements as Lucent is a supplier to most of the
major telephone companies.

                                       7

<PAGE>

MediaOne Group Inc. (UMG - $47.00 - NYSE) was formerly known as US West Media
Group and controlled the cable television operations of telecommunications
provider US West. The company is the third largest operator of cable television
systems in the U.S. MediaOne Group also owns 25% of Time Warner Entertainment
and several foreign cellular telephone properties. We expect the company to be a
leader in providing Internet access and cable telephony in addition to
traditional cable services.

Mellon Bank Corp. (MEL - $68.75 - NYSE), with the acquisitions in recent years
of Dreyfus Corp., The Boston Company and Founders Asset Management, has become
a powerhouse in money management services. We believe the rising contribution
to earnings from predictable fee sources will enhance the company's valuation.
We expect a continuation of Mellon's share repurchase program this year.
Current business trends are strong.

Microsoft Corp. (MSFT - $138.6875 - Nasdaq) is the world's leading provider of
computer software with a dominant position in personal computer operating
systems. The company is a leading provider of application software as well, with
such popular programs as OFFICE '97 and Microsoft Word.

Northern Trust Corp. (NTRS - $87.3125 - Nasdaq) is one of a few public asset
managers with a strong franchise in the wealth management market. With nearly
$200 billion in assets under management and fees generating 65% of income, the
bank's stock appears undervalued. Northern Trust is a trophy property within the
banking sector.

Sun Microsystems Inc. (SUNW - $85.625 - Nasdaq) is a leading provider of
hardware and software for network-based distributed computing systems. While
most of the company's revenue is derived from UNIX based workstations and client
servers, it is becoming best known for its Java operating software.

Time Warner Inc. (TWX - $62.0625 - NYSE) owns one of the best collections of
media assets in the world. In addition to being the largest operator of cable
television systems, the company is a leading content provider through its
ownership of CNN, Warner Bros., HBO, Turner Broadcasting and other premium and
basic cable programs. Time Warner is also a major factor in music and
publishing.

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.

THE ROTH IRA

     The Taxpayer Relief Act of 1997 included new tax incentives and more
opportunities to save for retirement and other major expenditures. The Roth IRA
is just one of these new opportunities now available at Gabelli Funds. Our
investor representatives are available at 1-800-GABELLI (1-800-422-3554) to
speak with you about the advantages of converting to a Roth IRA and to discuss
your investment choices.

                                       8
<PAGE>


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

     Our mission remains the same. We are charged with building a
well-diversified portfolio of America's greatest established growth companies.
This approach has led to a compound return of 30.8% over the last four years.
Last year was a challenging year for investors and this year may be equally
difficult. Let's keep our expectations down and hope to be pleasantly surprised
at the millennium.

     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 GABGX. Please call us during the
business day for further information.

     We thank you for your loyalty and as always, pledge our best efforts on
your behalf.

                                   Sincerely,

                               /s/ HOWARD F. WARD, CFA
                                   Howard F. Ward, CFA
                                   Portfolio Manager

January 29, 1999

                          TOP TEN HOLDINGS
                          DECEMBER 31, 1998
                          ------------------
   Home Depot Inc.                              Marsh & McLennan Companies
   Northern Trust Corp.                         Time Warner Inc.
   Cisco Systems Inc.                           Lucent Technologies Inc.
   Microsoft Corp.                              Sun Microsystems Inc.
   Mellon Bank Corp.                            MediaOne Group Inc.



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.


                                       9
<PAGE>
THE GABELLI GROWTH FUND
PORTFOLIO OF INVESTMENTS -- DECEMBER 31, 1998
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                   MARKET
  SHARES                                           COST            VALUE
  ------                                           ----            ------
<C>          <S>                              <C>              <C>
             COMMON STOCKS--99.6%
             BROADCASTING--4.7%
   950,600   CBS Corp.+.....................  $   27,571,836   $   31,132,150
   841,600   Clear Channel Communications         37,722,180       45,867,200
              Inc.+.........................
   365,000   Infinity Broadcasting Corp.+...       7,681,075        9,991,875
                                              --------------   --------------
                                                  72,975,091       86,991,225
                                              --------------   --------------
             BUSINESS SERVICES--4.8%
   330,000   Automatic Data Processing            16,294,823       26,461,875
              Inc. .........................
    60,000   Ceridian Corp..................       3,654,187        4,188,750
   489,050   Interpublic Group of Companies       21,892,432       39,001,737
              Inc. .........................
   292,000   Omnicom Group Inc. ............      15,272,092       16,936,000
    95,000   Young & Rubicam Inc. ..........       2,712,500        3,075,625
                                              --------------   --------------
                                                  59,826,034       89,663,987
                                              --------------   --------------
             CABLE--2.6%
 1,020,000   MediaOne Group Inc.+...........      39,028,859       47,940,000
                                              --------------   --------------
             COMMUNICATIONS EQUIPMENT--7.3%
   680,750   Cisco Systems Inc.+............      31,213,350       63,182,107
   470,000   Lucent Technologies Inc. ......      37,533,315       51,700,000
   305,000   Tellabs Inc.+..................      17,165,220       20,911,563
                                              --------------   --------------
                                                  85,911,885      135,793,670
                                              --------------   --------------
             COMPUTER HARDWARE--7.5%
   320,000   Dell Computer Corp.+...........       9,336,719       23,420,000
   320,000   Hewlett-Packard Co. ...........      22,393,890       21,860,000
   240,000   International Business Machines      38,612,310       44,340,000
              Corp. ........................
   595,000   Sun Microsystems Inc.+.........      22,143,722       50,946,875
                                              --------------   --------------
                                                  92,486,641      140,566,875
                                              --------------   --------------
             COMPUTER SOFTWARE AND SERVICES--10.3%
   335,000   BMC Software Inc.+.............      10,872,161       14,928,437
   670,600   Computer Sciences Corp.+.......      28,110,416       43,211,787
   560,000   EMC Corp.+.....................      28,179,147       47,600,000
   447,000   Microsoft Corp.+...............      40,741,130       61,993,313
   612,000   SunGard Data Systems Inc.+.....      22,149,129       24,288,750
                                              --------------   --------------
                                                 130,051,983      192,022,287
                                              --------------   --------------
             CONSUMER PRODUCTS--2.7%
   429,800   Gillette Co....................      17,752,867       20,764,712
   155,000   Procter & Gamble Co. ..........      11,668,444       14,153,438
   471,000   Ralston Purina Group...........      11,927,370       15,248,625
                                              --------------   --------------
                                                  41,348,681       50,166,775
                                              --------------   --------------
             DIVERSIFIED INDUSTRIAL--4.9%
   285,000   General Electric Co. ..........      24,961,368       29,087,812
   353,000   Honeywell Inc..................      23,745,632       26,585,312
   701,200   Sundstrand Corp................      36,249,882       36,374,750
                                              --------------   --------------
                                                  84,956,882       92,047,874
                                              --------------   --------------
             ELECTRONICS--3.6%
   335,000   Intel Corp.....................      31,964,246       39,718,437
   330,000   Texas Instruments Inc. ........      27,071,373       28,235,625
                                              --------------   --------------
                                                  59,035,619       67,954,062
                                              --------------   --------------
             ENTERTAINMENT--3.7%
   503,000   Disney (Walt) Co. .............      11,402,015       15,090,000
   860,000   Time Warner Inc................      36,903,431       53,373,750
    10,000   Viacom Inc., Cl. B+............         548,200          740,000
                                              --------------   --------------
                                                  48,853,646       69,203,750
                                              --------------   --------------
             FINANCIAL SERVICES--8.0%
   185,500   American International Group          6,114,574       17,923,937
              Inc. .........................
   944,500   Marsh & McLennan Companies           51,051,005       55,194,219
              Inc. .........................
   245,000   Merrill Lynch & Co. ...........      14,982,106       16,353,750
   750,750   Schwab (Charles) Corp. ........      15,458,751       42,182,766
   533,000   T. Rowe Price Associates             15,596,159       18,255,250
              Inc. .........................
                                              --------------   --------------
                                                 103,202,595      149,909,922
                                              --------------   --------------
</TABLE>
<TABLE>
<CAPTION>
                                                                   MARKET
  SHARES                                           COST            VALUE
  ------                                           ----            ------
<C>          <S>                              <C>              <C>
             FINANCIAL SERVICES: BANKS--10.4%
   740,000   Bank of New York Inc. .........  $   21,770,862   $   29,785,000
   813,000   Mellon Bank Corp. .............      32,231,642       55,893,750
   770,000   Northern Trust Corp. ..........      43,379,525       67,230,625
   579,400   State Street Corp. ............      21,527,917       40,304,513
                                              --------------   --------------
                                                 118,909,946      193,213,888
                                              --------------   --------------
             FOOD AND BEVERAGE--2.3%
   200,000   Coca-Cola Co...................       8,520,813       13,375,000
   337,000   PepsiCo Inc....................       8,852,736       13,795,938
   553,000   Sysco Corp.....................       9,218,165       15,172,938
                                              --------------   --------------
                                                  26,591,714       42,343,876
                                              --------------   --------------
             HEALTH CARE--8.9%
   272,000   Abbott Laboratories............       6,344,738       13,328,000
   310,000   Baxter International Inc. .....      16,732,395       19,936,875
   304,000   Becton Dickinson & Co. ........      11,091,671       12,977,000
   252,000   Bristol-Myers Squibb Co. ......      27,726,373       33,720,750
   147,000   Johnson & Johnson..............       8,634,194       12,329,625
   160,000   Lilly (Eli) & Co. .............      10,721,594       14,220,000
   168,000   Merck & Co. Inc................      17,517,119       24,811,500
   123,000   Pfizer Inc.....................       8,504,608       15,428,813
   249,000   Warner-Lambert Co. ............      11,365,379       18,721,688
                                              --------------   --------------
                                                 118,638,071      165,474,251
                                              --------------   --------------
             PUBLISHING--5.7%
   600,000   Gannett Co. Inc. ..............      30,620,165       39,712,500
   217,000   McGraw-Hill Companies Inc. ....      11,715,279       22,106,875
   768,000   New York Times Co., Cl. A......      22,012,718       26,640,000
   255,000   Tribune Co.....................      10,548,414       16,830,000
                                              --------------   --------------
                                                  74,896,576      105,289,375
                                              --------------   --------------
             RETAIL--12.2%
 1,517,718   Home Depot Inc. ...............      24,493,089       92,865,370
   904,000   Lowe's Companies Inc. .........      31,411,002       46,273,500
   325,000   Rite Aid Corp..................      13,710,563       16,107,813
   517,100   Tiffany & Co...................      23,048,041       26,824,563
   440,000   Wal-Mart Stores Inc. ..........      27,264,250       35,832,500
   176,000   Walgreen Co....................       1,709,613       10,307,000
                                              --------------   --------------
                                                 121,636,558      228,210,746
                                              --------------   --------------
                                               1,278,350,781    1,856,792,563
             TOTAL COMMON STOCKS............
                                              --------------   --------------
 
<CAPTION>
PRINCIPAL
  AMOUNT
- ----------
<C>          <S>                                <C>              <C>
             U.S. GOVERNMENT OBLIGATIONS--0.4%
$8,036,000   U.S. Treasury Bills, 4.09% to         
              4.54%++, due 01/07/99 to
              03/18/99......................        7,980,107        7,982,413
                                               --------------   --------------
                                               
             TOTAL INVESTMENTS--100.0%......   $1,286,330,888*   1,864,774,976
                                               ==============
                                                                     
             OTHER ASSETS AND LIABILITIES (NET)--(0.0)%.....          (218,882)
                                                                --------------
                                                               
             NET ASSETS--100.0%
              (52,671,581 shares outstanding)...............    $1,864,556,094
                                                                ==============
                                                                 
             NET ASSET VALUE, OFFERING AND REDEMPTION PRICE
              PER SHARE.....................................            $35.40
                                                                        ======
</TABLE>
 
         ------------------------
 
<TABLE>
         <C>  <S>                                          <C>
           *  For Federal tax purposes:
              Aggregate cost............................   $1,287,370,751
                                                           ==============
              Gross unrealized appreciation.............   $  577,938,115
              Gross unrealized depreciation.............         (533,890)
                                                           --------------
              Net unrealized appreciation...............   $  577,404,225
                                                           ==============
</TABLE>
 
- ---------------
 + Non-income producing security.
++ Represents annualized yield at date of purchase.
 
                See accompanying notes to financial statements.
                                       10
<PAGE>
 
                            THE GABELLI GROWTH FUND
 
STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 1998
- ----------------------------------------------------------
 
<TABLE>
<S>                                          <C>
ASSETS:
  Investments, at value (Cost
    $1,286,330,888)........................  $1,864,774,976
  Cash.....................................             562
  Dividends receivable.....................       1,009,947
  Receivable for investments sold..........         181,346
  Receivable for capital shares sold.......       4,775,404
                                             --------------
    TOTAL ASSETS...........................   1,870,742,235
                                             --------------
LIABILITIES:
  Payable for Fund shares redeemed.........       3,469,624
  Payable for investment advisory fees.....       1,509,796
  Payable for distribution fees............         377,449
  Payable for custodian fees...............          47,000
  Payable to Trustees......................           2,056
  Other accrued expenses...................         780,216
                                             --------------
    TOTAL LIABILITIES......................       6,186,141
                                             --------------
    NET ASSETS applicable to 52,671,581
      shares outstanding...................  $1,864,556,094
                                             ==============
NET ASSETS CONSIST OF:
  Shares of beneficial interest, at par
    value..................................  $      526,716
  Additional paid-in capital...............   1,286,184,261
  Distributions in excess of net realized
    gain on investments and foreign
    currency transactions..................        (598,971)
  Net unrealized appreciation on
    investments............................     578,444,088
                                             --------------
    TOTAL NET ASSETS.......................  $1,864,556,094
                                             ==============
    NET ASSET VALUE, offering and redemption price per
      share ($1,864,556,094 / 52,671,581
      shares outstanding; unlimited number
      of shares authorized of $0.01 par
      value)...............................          $35.40
                                                     ======
</TABLE>
 
STATEMENT OF OPERATIONS
FOR THE YEAR ENDED DECEMBER 31, 1998
- ----------------------------------------------------------
 
<TABLE>
<S>                                           <C>
INVESTMENT INCOME:
  Dividends.................................  $ 12,908,009
  Interest..................................     2,797,401
                                              ------------
    TOTAL INVESTMENT INCOME.................    15,705,410
                                              ------------
EXPENSES:
  Investment advisory fees..................    14,542,759
  Distribution fees.........................     3,508,441
  Shareholder services fees.................     1,096,456
  Custodian fees............................       235,178
  Trustees' fees............................        89,000
  Legal and audit fees......................        60,817
  Miscellaneous expenses....................       991,136
                                              ------------
    TOTAL EXPENSES..........................    20,523,787
                                              ------------
    NET INVESTMENT LOSS.....................    (4,818,377)
                                              ------------
NET REALIZED AND UNREALIZED GAIN ON
  INVESTMENTS AND FOREIGN CURRENCY
  TRANSACTIONS:
  Net realized gain on investments and
    foreign currency transactions...........    87,865,238
  Net change in unrealized appreciation on
    investments.............................   299,383,776
                                              ------------
  NET REALIZED AND UNREALIZED GAIN ON
    INVESTMENTS AND FOREIGN CURRENCY
    TRANSACTIONS............................   387,249,014
                                              ------------
NET INCREASE IN NET ASSETS RESULTING FROM
  OPERATIONS................................  $382,430,637
                                              ============
</TABLE>
 
STATEMENT OF CHANGES IN NET ASSETS
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                 YEAR ENDED           YEAR ENDED
                                                              DECEMBER 31, 1998    DECEMBER 31, 1997
                                                              -----------------    -----------------
<S>                                                           <C>                  <C>
OPERATIONS:
    Net investment loss.....................................   $   (4,818,377)       $  (1,809,135)
    Net realized gain on investments and foreign currency
     transactions...........................................       87,865,238          161,959,991
    Net change in unrealized appreciation on investments....      299,383,776          106,084,148
                                                               --------------        -------------
        Net increase in net assets resulting from
        operations..........................................      382,430,637          266,235,004
                                                               --------------        -------------
DISTRIBUTIONS TO SHAREHOLDERS:
    Net investment income...................................               --              (47,113)
    In excess of net investment income......................               --               (8,321)
    Net realized gain on investments........................      (87,865,238)        (160,337,412)
    In excess of net realized gain on investments...........         (202,354)             (97,442)
                                                               --------------        -------------
        Total distributions to shareholders.................      (88,067,592)        (160,490,288)
                                                               --------------        -------------
SHARE TRANSACTIONS:
    Net increase in net assets from shares of beneficial
     interest transactions..................................      626,207,999          228,835,326
                                                               --------------        -------------
        Net increase in net assets..........................      920,571,044          334,580,042
NET ASSETS:
    Beginning of period.....................................      943,985,050          609,405,008
                                                               --------------        -------------
    End of period...........................................   $1,864,556,094        $ 943,985,050
                                                               ==============        =============
</TABLE>
 
                See accompanying notes to financial statements.
 
                                       11
<PAGE>
 
THE GABELLI GROWTH FUND
NOTES TO FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------
1. ORGANIZATION.  The Gabelli Growth Fund (the "Fund") was organized on October
24, 1986 as a Massachusetts business trust. The Fund is a diversified, open-end
management investment company registered under the Investment Company Act of
1940, as amended (the "1940 Act"). The Fund's primary objective is capital
appreciation. The Fund commenced investment operations on April 10, 1987.
 
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). 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, Inc.
(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 Trustees. Short term debt securities with remaining maturities of 60 days or
less are valued at amortized cost, unless the Trustees 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 Trustees. Short term debt
instruments having a greater maturity are valued at the highest bid price
obtained from a dealer maintaining an active market in those securities.
 
REPURCHASE AGREEMENTS.  The Fund may enter into repurchase agreements with
primary government securities dealers recognized by the Federal Reserve Bank of
New York, with member banks of the Federal Reserve System or with other brokers
or dealers that meet credit guidelines established by the Trustees. 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.
 
                                       12
<PAGE>
THE GABELLI GROWTH FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------
 
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.
 
Permanent differences incurred during the year ended December 31, 1998 resulting
from different book and tax accounting policies for currency gains and losses
and certain distributions received by the Fund are reclassified between net
investment income (loss) and net realized gain (loss) on investments at year
end. For the year ended December 31, 1998, reclassifications were made to
increase undistributed net investment loss for $4,818,377 and decrease
distributions in excess of net realized gain on investments and foreign currency
transactions for $3,085 with an offsetting adjustment to additional paid-in
capital.
 
PROVISION FOR INCOME TAXES.  The Fund has qualified and 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.
 
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 Trustees of the Fund who are its affiliates.
 
4. DISTRIBUTION PLAN.  The Fund's Board of Trustees has adopted a distribution
plan (the "Plan") pursuant to Rule 12b-1 under the 1940 Act. For the year ended
December 31, 1998, the Fund incurred distribution costs payable to Gabelli &
Company, Inc., an indirect wholly-owned subsidiary of the Adviser, of
$3,508,441, or 0.25% of average daily net assets, the annual limitation under
the Plan. Such payments are accrued daily and paid monthly.
 
5. PORTFOLIO SECURITIES.  Purchases and sales of securities for the year ended
December 31, 1998, other than short term securities, aggregated $1,098,283,197
and $563,841,299, respectively.
 
6. 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 against the line of credit during
the year ended December 31, 1998.
 
                                       13
<PAGE>
THE GABELLI GROWTH FUND
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- --------------------------------------------------------------------------------
 
7. SHARES OF BENEFICIAL INTEREST.  Transactions in shares of beneficial interest
were as follows:
 
<TABLE>
<CAPTION>
                                                                       YEAR ENDED                        YEAR ENDED
                                                                   DECEMBER 31, 1998                 DECEMBER 31, 1997
                                                             ------------------------------    ------------------------------
                                                                SHARES           AMOUNT           SHARES           AMOUNT
                                                             ------------    --------------    ------------    --------------
<S>                                                          <C>             <C>               <C>             <C>
Shares sold................................................   31,588,783     $ 992,367,041      29,696,140     $ 857,263,991
Shares issued upon reinvestment of dividends...............    2,299,838        80,836,284       5,734,075       153,468,414
Shares redeemed............................................  (14,188,364)     (446,995,326)    (27,348,725)     (781,897,079)
                                                             -----------     -------------     -----------     -------------
    Net increase...........................................   19,700,257     $ 626,207,999       8,081,490     $ 228,835,326
                                                             ===========     =============     ===========     =============
</TABLE>
 
8. SUBSEQUENT EVENT.  On February 9, 1999, the Adviser reorganized its
operations and corporate structure by transferring a portion of its assets and
liabilities to a successor adviser, Gabelli Funds, LLC, which is wholly owned by
Gabelli Asset Management Inc., a newly formed publicly traded company that is
80% owned by the former Adviser. Counsel to the former Adviser has concluded
that the ownership change does not constitute an assignment as defined by the
Investment Company Act of 1940, as amended.
 
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
 
Selected data for a share of beneficial interest outstanding throughout each
period.
 
<TABLE>
<CAPTION>
                                                                                 YEAR ENDED DECEMBER 31,
                                                             ---------------------------------------------------------------
                                                                1998           1997          1996        1995        1994
                                                                ----           ----          ----        ----        ----
<S>                                                          <C>             <C>           <C>         <C>         <C>
OPERATING PERFORMANCE:
  Net asset value, beginning of year.......................  $    28.63      $  24.14      $  22.16    $  19.68    $  23.26
                                                             ----------      --------      --------    --------    --------
  Net investment income/(loss).............................       (0.07)        (0.06)         0.03        0.05        0.07
  Net realized and unrealized gain/(loss) on investments...        8.58         10.34          4.27        6.39       (0.86)
                                                             ----------      --------      --------    --------    --------
  Total from investment operations.........................        8.51         10.28          4.30        6.44       (0.79)
                                                             ----------      --------      --------    --------    --------
DISTRIBUTIONS TO SHAREHOLDERS:
  Net investment income....................................          --         (0.00)(a)     (0.02)      (0.05)      (0.08)
  In excess of net investment income.......................          --         (0.00)(a)        --          --       (0.01)
  Net realized gain on investments.........................       (1.74)        (5.79)        (2.30)      (3.91)      (2.39)
  In excess of net realized gains..........................       (0.00)(a)     (0.00)(a)        --          --       (0.31)
                                                             ----------      --------      --------    --------    --------
  Total distributions......................................       (1.74)        (5.79)        (2.32)      (3.96)      (2.79)
                                                             ----------      --------      --------    --------    --------
  NET ASSET VALUE, END OF PERIOD...........................  $    35.40      $  28.63      $  24.14    $  22.16    $  19.68
                                                             ==========      ========      ========    ========    ========
  Total return+............................................       29.8%         42.6%         19.4%       32.7%       (3.4)%
                                                             ==========      ========      ========    ========    ========
RATIOS TO AVERAGE NET ASSETS AND SUPPLEMENTAL DATA:
  Net assets, end of period (in 000's).....................  $1,864,556      $943,985      $609,405    $533,041    $482,471
  Ratio of net investment income/(loss) to average net
    assets.................................................     (0.33)%       (0.23)%          0.12%      0.22%       0.31%
  Ratio of operating expenses to average net assets........       1.41%         1.43%         1.43%       1.44%       1.36%
  Portfolio turnover rate..................................         40%           83%           88%        140%         40%
</TABLE>
 
- ---------------
 
 +  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.
(a) Amount represents less than $0.005 per share.
 
                See accompanying notes to financial statements.
 
                                       14
<PAGE>
 
REPORT OF INDEPENDENT ACCOUNTANTS
- --------------------------------------------------------------------------------
 
TO THE BOARD OF TRUSTEES AND SHAREHOLDERS OF
THE GABELLI GROWTH FUND
In our opinion, the accompanying statement of assets and liabilities, including
the portfolio of investments, and the related statements of operations and of
changes in net assets and the financial highlights present fairly, in all
material respects, the financial position of The Gabelli Growth Fund (the
"Fund") at December 31, 1998, the results of its operations for the year then
ended, the changes in its net assets for each of the two years in the period
then ended and the financial highlights for each of the five years in the period
then ended, in conformity with generally accepted accounting principles. These
financial statements and financial highlights (hereafter referred to as
"financial statements") are the responsibility of the Fund's management; our
responsibility is to express an opinion on these financial statements based on
our audits. We conducted our audits of these financial statements in accordance
with generally accepted auditing standards which require that we plan and
perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements, assessing the accounting principles used and significant estimates
made by management, and evaluating the overall financial statement presentation.
We believe that our audits, which included confirmation of securities at
December 31, 1998 by correspondence with the custodian, provide a reasonable
basis for the opinion expressed above.
 
PRICEWATERHOUSECOOPERS LLP
 
1177 Avenue of the Americas
New York, New York
February 25, 1999
 
                  1998 TAX NOTICE TO SHAREHOLDERS (UNAUDITED)
 
For the year ended December 31, 1998, the Fund paid to shareholders, on December
28, 1998, long term capital gains totaling $1.745 per share. The Fund did not
make an ordinary income distribution (comprised of net investment income and
short term capital gains) in 1998.
 
                                       15
<PAGE>
 
        THE GABELLI GROWTH 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.)
 
<TABLE>
<S>                             <C>
                     BOARD OF TRUSTEES
Mario J. Gabelli, CFA           Karl Otto Pohl
Chairman and Chief              Former President
Investment Officer              Deutsche Bundesbank
Gabelli Asset Management
  Inc.

Felix J. Christiana             Anthony R. Pustorino
Former Senior Vice President    Certified Public Accountant
Dollar Dry Dock Savings Bank    Professor, Pace University

Anthony J. Colavita             Anthony Torna
Attorney-at-Law                 Herzog, Heine & Geduld, Inc.
Anthony J. Colavita, P.C.

James P. Conn                   Anthonie C. van Ekris
Former Chief Investment         Managing Director
  Officer                       BALMAC International, Inc.
Financial Security Assurance    
Holdings Ltd.
 
              OFFICERS AND PORTFOLIO MANAGERS
Bruce N. Alpert                 Howard F. Ward, CFA
President and Treasurer         Portfolio Manager

James E. McKee
Secretary
</TABLE>
 
              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 Growth Fund. It is not
authorized for distribution to
prospective investors unless preceded
or accompanied by an effective
prospectus.
 
- ---------------------------------------
 
                                            [THE GABELLI GROWTH FUND LOGO]
 
                                         THE
                                         GABELLI
                                         GROWTH
                                         FUND
                                                                   ANNUAL REPORT
                                                               DECEMBER 31, 1998



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