We all have a relationship to gender, because it is a fundamental concept in our society, whether you like it or not. (I don't like it, btw)
Yes, gender is an external force exerted on people because of their sex - no need for any internal gender identity at all.
And personally, I don't think that you're either of a religion, or atheist - there are people (eg. me) who doesn't know and doesn't care if there's a god. I not only don't believe, I don't disbelieve - so I wouldn't describe myself as an atheist.
I don't define myself based on other people's religions, or how they think men/women should act. I feel no need to use their labels or involve myself in those concepts at all.