It sounds familiar, like it should be a thing. I think I saw something once, but then I was making a page for this gender, which is based on the color palette for the gendergoddess flag, and the one I remember for it looks nothing like that.
So I looked around a bit. Didn't find the other flag I saw. But I found this, which (from what I understand) used to be posted on Tumblr, but isn't anymore. If you go Internet hunting, //don't// click the Tumgik link[s]. Idk what that site is, but that's where I got these screenshots, and it kept trying to attack my computer. Couldn't click any link or it went to... questionable sites.
So in short, I'm confused. Anyone got ideas?