Since Genesis says that "God created humans in God's image; male and female God created them", one might infer that God is at least as female as God is male.
Personally, I think assigning a human gender is a silly thing to do to your concept of God. (I'm not crazy about assigning gender to humans, for that matter.)
But I think it's safe to say that God is as much not-male as God is not-female. That's why I don't say "He" or "Him" or "His" when referring to God. I just say "God".