No... but who cares.. great game DRM free.. I have it on steam and just re purchased on GOG
And you have AW-PC both on Steam & GOG becaaaaaause?!
The Steam release has achievements and came out first. The GoG release is more easily archived and shows support for GoG.
If memory serves, the game was 30 bucks (plus a discount if purchased at Gamersgate). So add 15 from GoG, and you have 45 bucks: Less than the price of a new game.
Hell, I would say that over half the games I have on GoG are games I purchased either at retail many years ago or from other DD services. GoG gives me a very easy to back-up version, nice extras, and ease of installation. And, for the most part, the price is well within what I think said game is worth, even factoring in multiple purchases.