Possible to link GamersGate Mass Effect to Steam? any benfit?

So I was browsing steamgamesales.com and saw that mass effect and mass effect 2 were 75% off on GamersGate (expires in two hours)

Wasn't after I purchased it when I wondered to myself if I'm going to be missing out on stuff because I didn't get it through Steam...

Am I? And if so can I link them to Steam afterwards?

Thanks.

It's the same game where ever you get it. Not missing anything, plus you can just use the option add a game if you want to use the steam ui in game. I say go for it, me2 is a pretty good game. Never played the first one but a friend of mine says it's really good.

Thanks. I was a little bit worried that I might have wrecked something.

So I finally was able to install it. Unfortunately it won't work with the Steam Tile app, which I use and really like.