Have yet to test any, but since GOG generates a new entry for the game on one's library with the mod pre-applied, I would presume at least the mod manager part wouldn't be a concern as it wouldn't be present.

I'm more than ok with that. At some point the entire point of GoG is necessarily the curation, and this is a good complement to their maintenance work, which before ended up existing alongside community fixes instead of incorporating them.

They've also added some features to Galaxy and improved the checkout experience. It's encouraging to see them roll out new platform features. For a while there it seemed like it was somewhat abandoned and just coasting, which was concerning in a world of effective Steam monopoly on PC gaming.

I hope it will include all kinds of mods, though I'm afraid you might be right.