Since there is no native PC version, here are your legal options:
Gears of War 2 was never officially released for PC. It remains an Xbox 360 exclusive, though it is playable on newer Xbox consoles via backward compatibility. Töltse le a Gears of War 2 PC-játékot 2008
If you want to play the series on your computer, these titles have official PC versions: (Remake of the first game) Gears 4 Gears 5 Gears Tactics Since there is no native PC version, here