It's a Feral port so no luck I guess. :( There's a lot of Feral ported Square games that arrive on GOG lately, it's a true shame that nothing could be done to see these ports here...

Every time I have asked Feral they have always said that they have no plans to release their ports onto GOG. Square either can't or won't do it themselves.

Since the price was right and I prefer to avoid Steam when possible, I decided to buy it here and try it out using Wine. So far, I have only started it and moved around a little, but the main game and Before the Storm seem to work just fine. I'm using Wine 5.4 with DXVK enabled. Of course, everyone's system is different, so I can't guarantee anything, but since it didn't require any tweaking aside from the common.dll fix, and it uses the Unreal engine, which usually plays well with Wine, I think it should work for most people.

Note that the fix to the common.dll file described in the "Won't launch: possible FIX" thread is required; it will crash without this change. (GOG might correct this at some point, so after updates, this fix might not be necessary.)

I'm surprised there's not even a macos version, but perhaps not so much, since every couple of major OS versions it requires some work to get it to launch on mac, I can only imagine how that is between distros.

It's a nice suggestion though, even if it's running via a wine wrapper.