I'm not a feminist, but if a someone wants to start a girls school...what's the problem?
There's two big problems:
1) This appears to be a *taxpayer-funded* school. If you want to establish some weird-ass exclusionary school and fund it all yourself, you have that right: lots of wacky religions do exactly this. It sucks for the poor kids being brainwashed by that BS, but at least it isn't condoned by the government and the rest of us taxpayers.
2) This entirely smacks of "separate but equal". What's next, separate public schools for blacks and whites? Aren't we supposed to be progressing from the backwardness of the 1950s?
And, honestly, if I could send my daughters (of which I have 3) in the hopes that they appreciate tech more than cheerleading, boys, and fashion, I would do it in a *heartbeat*
If you're worried about that, the answer is simple: private school. There's usually good private non-religious schools around that you can send your kids to where they don't have a lot of that crap. The reason you get all that crap is because public schools have to take everyone, so it's a by-product of the overall culture of the community you're in. It's no different than why The Kardashians and Honey Boo Boo are popular TV shows.
Just overcoming the "helpless-fashion-model-princess-homemaker" mental conditioning is hard enough
How is that hard? You're the parents, and kids get this mental conditioning mostly from their parents and their relatives. So if you don't agree with that mentality, don't teach your kids that way, don't let them be around any relatives like that, don't buy them Disney movies that teach this, and don't get involved in any religious groups that teach that crap. You're the ones in control; start acting like it.