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
GOG has the same drawbacks as Steam without any of the useful features. They should cut down on their "owning games" lies and spend time improving their platform instead.