In some respects yes, in some respects no.
It helps that she is a gamer herself. and not the sexist a-typical female gamer, though she is playing frontierville, farmville, cafeworld as I write this.
But she started out old school with games like Mario and guantlet. She even helps her sons friends earn achievements on 360 in games like the call of duty franchise. We even have been known to game together, as we at one time played as a static group in Everquest, until she basically took my toon over and made him a two box tank.
So yes she is accepting in that im a gamer, but at the same time shes not.
We have different play styles, shes more action oriented, where as im more of a puzzle/rts/rpg type. She skips cutscenes, whereas i dont get the motivation to repeat the same actions if there isnt some sort of exposition explaining why. Shes more of a group oriented player, where as Im an old school soloist.
So the biggest way shes not supportive is that she will get jealous when I dump like 60 hours of my life focused on something like KOTOR, because shes not a part of that experience, and takes it as relationship neglect. Which from my understanding, its that form of "neglect" that is at the root of why some girls resent games.
On a humorous side note, I was once accused of being attracted to CJ from San Andreas, simply because I was paying too much attention to him.