Lemme copy my own post from somewhere else

GOG’s installers work great with Wine as do the games themselves. If you desperately need a launcher before you can even consider them, you can use Heroic Games Launcher - in fact I’d prefer if they throw their weight behind it than on Galaxy. A match made in heaven.

I guess the other good thing is GOG is not a US company, they’re based in Poland. No tax money going to the American regime and their shenanigans I never asked for.