Well most of GOG's list of games are games made for old computers with not so powerful hardware and OS. I suggest that once Galaxy is fully released GOG starts working on a different version of Galaxy special for old PCs. I know this is isnt an easy thing to do but I think it would make sense that the page called "Good Old Games" sells old games made for old computers and has a platform perfect for old computers with outdated hardware and/or OS.

May be it wont happen but I think GOG should definitely think about it.

1) GOG is no longer called Good Old Games. Hasn't been called that longer than it has been called that.
2) GOG was never about selling old games made for old computers. GOG was about selling old games that run on modern computers.
3) Galaxy requires internet access. If you want to use Galaxy on a computer with an older OS, that means said computer has to be connected to the internet. Please don't.