Mixcoatli: People have been asking for a Linux client for quite some time now and they still don't have it... Chances are if we see anything for running your GOG games and Galaxy on ARM, it'll be community driven first before GOG gets to it.
Actually one community-based app already exists that also has GOG integration and not just Steam/Epic.
amok: GOG did announce this summer that they will make a native Galaxy client as well
https://www.linuxjournal.com/content/gog-officially-expands-linux-support-native-galaxy-client-development I'm super stoked about the Linux client. We should've had one ages ago, it's cool that we're finally getting it. Just hope it actually comes out soon.
Themken: ARM processors getting pretty powerful is an understatement seeing how fast at least Apple's new processors are.
Dude, I'm seeing people successfully running PS4 games on some of these mobile processors. Not very well, but it's insane that it's at all possible. The RPCS3 team has also been praising ARM for being a very good platform for their emulator.