Gt210 should work fine under that Psu. But it's weak card and is not suitable for any "cool" games like - Bf3, mw3, skyrim...
But it would be nice if you could specify what hides under "gaming" for you.
Any way you could aim for Gt220, it's still low-end, not very far more costly(+~10-20$), but it's far more better then Gt210.
Here some bench - http://www.cdrinfo.com/Sections/Reviews/Specific.aspx?ArticleId=26333