I got lucky. My girl LOVES her some Palladium games, because she likes playing Tank Girl style characters that smash and blow shit up. It's because of this that I rarely run them. Lawlz.
Having said that, I always kinda brace myself about female gamers. I'm not sexist but I've had some waaaaaaay bad experiences. Half of the female gamers I've met here in Arizona are tied to the LARP scene, which means some very bad, bad, bad psycho hambeast things. I still have nightmares about some of the LARP scene girls I've met here in town.
So fess up, though. Did this "giving out of the phone number" seem more of a flirty thing or a game thing? Because that sucks for you if it was a "game" thing. Ugh, imagine that? You get a chick's phone number and she goes "Oh wait, hold up. No, I didn't give you that number because I wanted to go out with you. I wanted to get into the GURPS game you were going to run."
I don't know if I could recover from being told that, personally.