By the way, I think it's quite un-Caldari for women to be issued a skirt in the military. It's distracting to men, it's not as efficient as producing pants for everyone, and it's either loose/revealing or restrictive to movement to wear a skirt.
Then again, I've never worn a skirt, so I can't say for certain on that last bit. But either way, I imagine no gender bias for standard issue uniforms. If the houses and buildings of Caldari all look the same, and the ships are utilitarian to the point of ugly, why should the Caldari differentiate between a male and female uniform?
ADDENDUM:
I'd also like to point out the very real possibility that those wanting Caldari women to wear skirts and such in the military are likely thinking - again - from a very western modern day perspective. Skirts are hot, and they are flattering to our senses. The same may very well not hold true to fictional Caldari sensibilities.
POST ADDENDUM:
Is there something about skirts that would make it likely to be standard issue to Caldari servicewomen? Perhaps less cloth required to make it? What is it about skirts that would make the Caldari say, "Hmm, yes this is the clear choice over pants for women."