#GOG integration is all ready to go and smoke tested. But the backing data is probably stale on a good portion of user installs. This needs to be fixed before launching this work.
I've been kicking it around a little bit, but I may end up packaging a dump of the catalog with the installer, bulk loading it, and throwing it away after import. The benefit of this too is that it would prevent a huge catalog fetch on initial install, and should help get people up and running quicker.