LiveSplit does work on the GOG version, all you gotta do is go download the 1.1 patch for the game, and then LiveSplit will work !

https://www.frictionalgames.com/forum/thread-24333.html

I am using the load removal in LiveSplit (in Splits settings) but I dosen't work, I tried reinstalling, putting compare against game time, running LiveSplit as admin, I just don't know what to do anymore, anyone have any clues ?

(I'm playing on the GOG version in windowed mode)