Using the in game and/or Nvidia CP Vsync doesn't seem to be preventing screentearing. Since it was pretty much a consistent tear line I thought it may be an aspect ratio problem, so I turned off aspect ratio scaling (ie, so there's black bars on all sides of the game) and the screen tearing still remained on the same spot of the image (not the monitor per say.) Pretty much anytime I scroll in the game, I get the tearing.

I have a GTX 770 and Windows 7.

Anyone find a way to fix the screen tearing in this game?

Btw, I don't want to put rivatuner/D3D/etc on my system.

I had the same problem tonight, although it wasn't a gog version of the game.

I have gtx 660.

The solution that worked for me was to switch by Enter+Alt into window mode and back. Tearing wasn't there anymore. (I set vsync into "off" since it didn't work.)

Stupid, but it did the trick.
I know it is 2 yerars after the previous post, but maybe it will help someone.