Exhibit 13.1

                   CERTIFICATION OF PERIODIC FINANCIAL REPORT
                       PURSUANT TO 18 U.S.C. SECTION 1350


         In connection with the amendment to the Annual Report of GigaMedia
Limited (the "Company") on Form 20-F/A for the year ended December 31, 2002 as
filed with the Securities and Exchange Commission on the date hereof (the
"Report"), I, Raymond Chang, the Chief Executive Officer of the Company, hereby
certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906
of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

     1.  The amendment to the Report fully complies with the requirements of
         Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

     2.  The information contained in the amendment to the Report fairly
         presents, in all material respects, the financial condition and results
         of operations of the Company.

Date: August 14, 2003

                                                     By: /s/ Raymond Chang

                                                     ---------------------------
                                                     Raymond Chang
                                                     Chief Executive Officer

*        A signed original of this written statement required by Section 906 of
         the Sarbanes-Oxley Act of 2002 has been provided to the Company and
         will be retained by the Company and furnished to the Securities and
         Exchange Commission or its staff upon request.

                                       87