As far as i can tell, i haven't found a way to determine if the game is patched, since there is an official patch, but i doubt it'd wok on GOG's version. Anyone?

I believe that this version of the game is, in fact, patched.
I read through the "read me" of the 1.1 patch and did not notice any of the "unpatched" problems. ie. no white grass noticable, no flashing sun noticable, and I was able to go from high textures to medium with no problems etc...

I believe I recall reading that all games here are pre-patched.
However, if I did, I can't find where.
Karl