Well she's certainly gotten more into games since she's gone out with me, but she doesn't have time for the most part, being in final year. I did get her big into Mario galaxy, Portal, Bioshock and to a lesser extent Fallout 3.
New Vegas has a lot more options that just "shoot them dudes, then solve this by shooting more dudes", and it has a way better story, so I'd imagine she'd like it a lot more when she has time for me to force it on her play it of her own volition.
So she's not the full on gaming nerd I am, but definitely more than most people I know.