To people who have the game:

The scaling distortion showing in GOG's screenshots, is that actually how the game appears or did GOG just screw up the screenshots?

GOG screwed up. The game doesn't distort at all; it puts black bars around itself to keep it at an integer multiple of the base resolution (i.e. it's scaled at 100%, 200%, or 300%, and it'll probably go higher if you have a big enough screen).

Cool thanks, that's as good a reply as I could have possibly hoped for. Integer scaling is my preferred option as well as it keeps everything nice and sharp.