Dude, if you think it's a girls bike then you should be in a different sport. Really. It isn't a girls bike, but it is a little kids bike, and you will always be asked why you ride little kids bikes when you aren't 5 anymore. Why not grow up and get a mountain bike instead of that kids bike?
Geez, it's a freestyle bike, and none/almost none are girls bikes. Even if you were on a girls bike, you should ride it and not worry about what others think.