Our group seems particularly unlucky when it comes to GFs and gaming.
For me, my ex-GF gamed with us when we went out for the first time in High School and it worked out. When we got back together after college (long story there in itself) she gamed with us for a while in my 2nd Edition Exalted game. I explained the rules poorly too her when I was explaining the character I made for her - mostly because I didn't have a firm grip on the whole thing - and each time afterwards, we'd end up fighting any time I'd try to explain the rules.
Then she'd play and get upset with me while we were playing because she didn't understand how they worked... Yeah. So, after that we kind-of mutually decided that she wouldn't game with us. So instead, she'd just sit in the room while we played and make snarky comments. So we stopped playing at my house. Then she'd call me two or three times during the game trying to get me to come home or, when I started turning off my phone, just lay a massive guilt trip before I left...
So, yeah, that relationship is over (not because of gaming, but the gaming brought some of the issues out that ended it).
One of my friends quit gaming, I think anyway, in part so he wouldn't have to tell women that he played as he went out wife-hunting.
One of my other friends didn't tell women that he played for a long time, then when he finally met one that found out and wanted to play, he wouldn't let her. I think now he's being a bit more open about it, but not sure since he doens't play with us anymore (due to 4e).
One of my friends has a wife that he WoWs with and who tried gaming with us for a bit, but she was a bit too litterally minded and got bored when we weren't rolling dice and killing things.
One of my friends who moved to California WoWs with his wife too, but she's never expressed interest in roleplaying.
My friend in the Navy probably told his fiancee about his gaming, but she doesn't strike me as the gamer sort.
So, group total:
2 single guys(me included as of January 1st).
1 married guy with wife who tried it, but wasn't interested.
1 married guy who games, but wife isn't interested.
1 soon-to-be married guy who games, but fiancee probably isn't interested.
1 dating guy who games, no idea if his current GF games.
1 married guy who quit gaming.