@Rainbow Dash
Technically, a gender imbalance would be accurate to horse populations. Not everyone is interested in the xenofiction angle, but sticking with the on-screen gender ratio is hardly an odd choice.
That said, the gender ratio isn’t as extreme as some think. The number that I’ve heard is about one-third male, which is probably closer to human numbers than it should be.
Equestria being a matriarchy is pretty much canon, though it isn’t like males are being enslaved or exiled. Male rulers on screen or implied are a definite minority. We’ve heard of two male rulers, although it’s possible that Rainbow Dash was crosscast as Commander Hurricane, as the military seems to be a male run institution.
A male military force subservient to a female government is actually a workable extrapolation of herd stallion and bachelor herd behaviors, although I doubt that it was on purpose.
@Princess♠Molestia
Why would Gilda be a representation of Gryphon culture, anyway? From what we know, she spent her childhood in the same place as Dash, so she’s more likely to be a denizen of Cloudsdale rather than some theoretical Griffon nation.