Madmate: Well, GOG is selling System Shock 2, not a patch, so what is the problem?
I never seen anywhere that Dosbox or ScummVM people have issues with GOG releases.
If the patch-makers have problem with release, why don't they sue. It would be funny to see how would it go.
And GOG nowhere claimed patch as their own.
Yes, actually, they explicitly did:
Kick (ND): Night Dive Studios secured the license to distribute the game, and made the initial modifications to allow the game to run on most current operating systems.
Rambourg (GoG): There are some user-made mods out there which do phenomenal work on the game’s stability, but none of them were quite perfect, so we took the game to our expert techninjas to analyse and swat the remaining bugs. It was some work to get it done, but as this is a game that we’ve wanted to release for four-plus years, it was also definitely a labour of love.
http://www.rockpapershotgun.com/2013/02/13/many-questions-system-shock-2-comes-to-gog/