I'm all for removing artificial barriers, but once they are down we're gonna have to accept that maybe girls really do want to be princesses and maybe guys really do want to be monster trucks (not drive, be damnit, BE!)
Sure... once they're all down you will see differences. But they have never all been down.
Fundamentally, unless you have a significant community that actively tries to not focus on girl things with girls and guy things with guys, including training for parents who are dedicated to it, you're not going to escape your culture's gender norms. You can limit their influence, but they're still there. There are *trillions* of dollars of material and millenia of cultural inertia behind and imbued with those norms.
But there are traits that are admirable in the norms of both genders, and the trick is getting kids interested in those things. Experimenting, inventing, exploring, building things, designing things, social graces--there are lots of important traits, things it's good to bring out. Find a few parents who think the same way you do and try to set up activities around those things. Like lesson plans.
Also, look at parenting groups. Maybe even reach out through your college alumni networks to see what people from your school have done. I'm sure there are lots of parents around the country who wonder about this.