I would also say that as long as GOG also clearly showed that the Linux version was available as well. For instance,

Supported Platforms: Windows XP, Windows Vista, Windows 7
Other (unsupported) Platforms: Linux, Mac OS

That would be best, I think.

I totally agree!

What about providing archives for DOSBox games?

Xyem and I are reaching a point where we could translate the work we've done for Arch to multiple distros.

Just saying.

I'd be happy if GOG purchases of indie titles would include a code/whatever so we could directly download from the developers too. Similiar to the steam keys included in humble bundles.

And once again, I (shamelessly) point at this wishlist item:
http://www.gog.com/en/wishlist/site/extra_file_archives_for_dosbox_games

Normally I agree with the sentiment (and I am a Linux user myself, although never seem to graduate from my newbie status after all these years), but I guess at this point I'd rather GOG staff focus on fixing *broken* games already available in the catalogue first, such as Silver, Gorky 17 (although I personally have no problems with it, but others obviously do), etc. before branching on supporting our beloved platform Linux.

I don't see much work for them to support linux and macos.

Just add the stuff where its possible. Also could cover all new indie games that have linux/macos port. Project Eternity comes to mind :) But I know there are a ton of others.

I don't think there is so much work adding a few additional lines and filters on the shop page. Also 95% of dosbox games should work in linux/macos no problems. And a lot of others could work through wine.

Might increase the user base a bit and coincides nicely with other stuff that is recently appearing.

Yeah, that comes up and I'm still not sure why it hasn't been done. Especially for the DOSBox games where they'll run on anything that DOSBox supports.