Y'know, I always saw the Gems as kinda like the Transformers. Here's an alien race, which really has no gender or binary reproductive system, but they just so happen to meet common gender associations on earth, so we call them by usual pronouns just to make it easier to talk to/about them. Because I mean, we're human, they're not. Can't understand EVERYTHING about them, just gotta use what we know. One could totally make the argument that Optimus Prime is agendered. Just my thoughts on it.
Totally! There are a lot of ways to relate to the gems, and a whooole lot of room for fandom fun doing so! I have fun fleshing them out as ladies, but it’s also fun to go for all kinds of things~
Same goes for me n’ Sanderson Mansnoozie haha. Agender being of the stars, crashlands on earth, called “sandman”. Voila, people use he/him pronouns. And Sandy rolls with it and does whatever he wants, still agender.