I'm coming from the perspective of a daughter who was and is pretty gender non-conforming, so my advice may not be useful generally, but I hope it helps anyway.
I think other commenters have talked about not saying "Girls do this" and "Girls don't do that", and an important aspect of that is to not be inherently dismissive of feminine/masculine attributes as whole. If she ends up being the only geek-ish type girl she knows, it becomes easy to dismiss the "feminine" interests of her peers as lesser compared to her own. So, expose her to media with significant female characters, but not just those who resemble her or share her interests. Actually,... (read more)
I'm coming from the perspective of a daughter who was and is pretty gender non-conforming, so my advice may not be useful generally, but I hope it helps anyway.
I think other commenters have talked about not saying "Girls do this" and "Girls don't do that", and an important aspect of that is to not be inherently dismissive of feminine/masculine attributes as whole. If she ends up being the only geek-ish type girl she knows, it becomes easy to dismiss the "feminine" interests of her peers as lesser compared to her own. So, expose her to media with significant female characters, but not just those who resemble her or share her interests. Actually,... (read more)