I never really look at the gender of the comments, or even look at the pictures, if there are any... I would suspect a lot of people are that way.

Once upon a time, I was in IRC having a discussion with someone about the electronic art scene... it was a few months later I discovered the person in question was even a she.

This is in particular one of the things that's great about open source, online communications, and github culture... it really doesn't matter your gender, race, or anything else, so long as you make an effort, you'll generally fit in just fine.