Game manager Lutris v0.5.20 released with Proton upgrades, store updates and much more
(www.gamingonlinux.com)
GOG have historically been Linux haters. With the recent change in ownership, it seems that might be changing, and if true it means the ones who were anti-Linux were probably CDPR rather than the GOG team.
In any case, GOG games work well through Lutris for me, but there's also Heroic as an alternative.