To be perfectly frank, most of the time, most people don't care if you are a guy or a girl. As long as you are a cool person-- people don't care.
You know who often gives girl gamers a bad reputation? Girl Gamers. If you act like a Jedi Mind-Ho-- or an Intergalactic ******, then that's your problem. I have no issues being able to have a conversation in general, no matter if I tell people I'm a woman or not. Sure, you get one or two kids who pull the 'no girlz on the interwebz' but they go away if you just don't respond to their crap.
I have just about zero respect for women who pretend to be all harassed and stalked on their video game. It's way, WAY too easy to avoid/ignore people who act like douchebags. Act like an adult, and you'll be treated as such.