Gog games
2.1 We give you and other GOG users the personal right (known legally as a ‘license’) to use GOG services and to download, access and/or stream (depending on the content) and use GOG content. This license is for your personal use. We can stop or suspend this license in some situations, which are explained later on.
https://support.gog.com/hc/en-us/articles/212632089-GOG-User-Agreement?product=gog
You do not own games purchased on GOG. Same as Steam, EGS, Ubisoft Connect… GOG shills like to spread the lie that you own GOG games, thus justifying the use of their garbage platform, but when asked to explain how, they just say you can download the EXE so it’s functionally the same as owning (omitting, of course, that you can run most Steam or EGS games without having their respective clients installed, as that would go against their narrative).
By now my GOG library has far exceeded my Steam library in size. I was surprised by how many games on my Steam wishlist are also on GOG.