JGML offered a downloadable .lzh file as an "offline" archive, and the last time I grabbed it was May of 2002. It's 1MB and contains the directory listings by various sorting methods (such as year of release and by alphabetical game title), but not all the individual pages.
Here, at least it's something:
JGML_gamemusichistory_off.lzh
sendspace.com/file/h3pvrw