I understand your point. I used to think their ESG policies would rule their standards for what games to host. I'm not 100% sure.
From GOG I read a VN called "Slippery Richar He's Taller than my Husband" (fake western name) which is all about blackmail extortion ntr sex and racist premises of black men as sex beasts in the eye of japanese people, and also racist notions from western people toward japanese people as sexually incompetent at a cultural and physiological level.
So I think maybe GOG has some hope of still be defending freedom of expression, but I must also note that this VN was published in GOG 3 years ago, and maybe things changed. Still, the game is being sold there to this day.
In any case I'm not sure of GOG stance which I why I wished for this dev to try selling it there. Maybe telling us how did it go after.