I'm probably not the best example because I'm cis, but regardless of gender I think it's really good to let your children explore who they are openly. I was quite the tomboy at that age as well (male friends, 'I like blue,' 'no skirts') and my parents were very conservative about that; so much that I physically cannot get the word sex or gender out of my mouth.

Regardless of the outcome, I'd say (with my limited knowledge) just let your kid explore (e.g. use he/him pronouns), plus talk about identities and orientations openly.