April 29, 2010

Ms. Laura E. Hatch
United States Securities and Exchange Commission
Division of Investment Management
100 F Street, N.E.
Washington, DC 20549

Re:      GAMCO International Growth Fund, Inc. (the "Fund")
         Post-Effective Amendment No. 20 to the Registration Statement
         on Form N-1A (33-79994)

Dear. Ms. Hatch:

         This  letter  responds  to your  additional  comments  communicated  by
telephone on April 28, 2010, with respect to the Post-Effective Amendment No. 20
to the Registration Statement on Form N-1A (the "Registration Statement") of the
Fund that was filed with the Securities and Exchange  Commission  (the "SEC") on
February 26, 2010 (accession number 0000950123-10-017786).

         In addition, in connection with this filing, the Fund hereby states the
following:

         1.       The Fund  acknowledges  that in  connection  with the comments
                  made by the Staff of the SEC,  the Staff has not passed on the
                  accuracy or adequacy of the  disclosure  made herein,  and the
                  Fund and its management are solely responsible for the content
                  of such disclosure;

         2.       The Fund acknowledges  that the Staff's comments,  and changes
                  in  disclosure  in response to the  Staff's  comments,  do not
                  foreclose   the  SEC  or  other   regulatory   body  from  the
                  opportunity  to seek  enforcement  or take other  action  with
                  respect to the disclosure made herein;

         3.       The Fund  represents  that neither it nor its management  will
                  assert  the  Staff's  comments  or changes  in  disclosure  in
                  response to the Staff's comments as a defense in any action or
                  proceeding by the SEC or any person.

                  The Fund's  responses to your  comments are  reflected  below.
         Comments that applied to both the Class AAA Shares  prospectus  and the
         Class  ABCI  Shares  prospectus  have only  been  addressed  once.  The
         substance  of  your  comments  has  been  restated  for  your  ease  of
         reference.






         COMMENT #1-PRINCIPAL INVESTMENT STRATEGIES: You have requested that the
         Fund specifically  reference the quality of the convertible  securities
         in which it invests.

                  RESPONSE #1: The Fund has added the following under "Investing
                  in the Fund involves the following risks:":

                  o CONVERTIBLE  SECURITIES AND CREDIT RISK. The characteristics
                  of convertible  securities make them  appropriate  investments
                  for  investors  who seek a high level of total return with the
                  addition of credit  risk.  These  characteristics  include the
                  potential  for  capital  appreciation  if  the  value  of  the
                  underlying  common stock increases,  the relatively high yield
                  received  from  dividend or  interest  payments as compared to
                  common  stock  dividends,  and  decreased  risks of decline in
                  value,  relative to the  underlying  common stock due to their
                  fixed income nature.  As a result of the  conversion  feature,
                  however,  the  interest  rate  or  dividend  preference  on  a
                  convertible  security is generally less than would be the case
                  if the  securities  were not  convertible.  During  periods of
                  rising  interest  rates, it is possible that the potential for
                  capital gain on a  convertible  security may be less than that
                  of a common stock  equivalent if the yield on the  convertible
                  security is at a level which  causes it to sell at a discount.
                  Any  common  stock  or  other  equity  security   received  by
                  conversion  will not be  included  in the  calculation  of the
                  percentage of total assets invested in convertible securities.
                  The Fund  generally  will not  invest  more than 5% of its net
                  assets in  convertible  securities  that are below  investment
                  grade.





                  Should you have any questions regarding the foregoing,  please
                  do not  hesitate to contact  Helen A.  Robichaud at PNC Global
                  Investment Servicing,  Inc., the Fund's Sub-Administrator,  at
                  617-338-4595.

                  Very truly yours,

                  /S/ BRUCE N. ALPERT
                  Bruce N. Alpert
                  President

                  cc: Helen A. Robichaud             Arlene Lonergan
                  PNC Global Investment              PNC Global Investment
                  Servicing, Inc.                       Servicing, Inc.

                  Peter D. Goldstein                 Christopher Tafone
                  Gabelli Funds, LLC                 Paul, Hastings, Janofsky
                                                     & Walker LLP

                  Rachael Schwartz
                  Paul, Hastings, Janofsky
                  & Walker LLP