Here's a little something if your gf is anything like mine. Mine like puzzle games, platform games, racing games, just about anything except FPS and RPG games. Then she said she wanted to try that King Kong game. Anyone whose tried Kong knows there's a FPS aspect to the game. But it's usually with a spear and in the beginning, all of the enemies are these slow little bugs and stuff. So it made it pretty easy for her to be successful at moving around and fighting. To my surprise, she actually still enjoyed the game, and got pretty good at it. So, after beating Kong, I thought, maybe we should try Condemened, since it to has the FPS feel to it. And she got sucked into that story line as well, and we played that through to the end.
So then I decided to try something more FPS focused, and rented PDZ. To my surprise, she's actually asking to play that now. I still don't think she's ready for GRAW or anything like that, but it's building.
Now if only I could find a way for her to enjoy RPG's.......
Hopefully if any of you have GF's similar to mine, this might work for you. Best of luck converting your GF's to First Person Shooter fans.