Hello, I have just bought a new PC and I would like to check, if the gog installation of the game has all other necessary programs included (e.g. Direct X or vcredist.). In other words can I just install OS, drivers and game and play?

I don't believe so; at the very least you'll likely have to install DirectX if you don't have it already. As for visual C redistributable, that I can't answer. I'd make sure DirectX is in, then move forwards from there.

Thanks, I would expect the gog version to be the same as DVD version, but it seems I will have to try and see.