Jokes aside, I think the correct one should be “binaria” because it’s “persona no-binaria”, where “persona” being a female-gendered word still includes everybody (persono doesn’t even exist).
Really, if you replace “gender of the person” to “gender of the noun”, ChatGPT is correct.
It’s people who can be little more picky about pronouns and stuff
Precisely. It is “el género no binario” or “la persona no binaria”. It has nothing to do with the person, just the nouns. As “binario/a” is an adjective, it has no gender on its own.
This legitimately trips up learners. How if the noun is female, it’s correct to use feminine articles/pronouns/etc regardless of the person’s gender, even if you know they’re male. (or vice-versa).
That and plurals defaulting to male.
And if the noun is a person’s name? Then how do you determine whether to use the masculine or feminine version of non-binary?
Native speaker here and no, that wouldn’t be correct as a general rule. The most typical would be talking about or someone else like “yo soy no binario/a” and “yo” would be a he or a she depending on who is saying that. If you’re talking about someone else it’s “el/ella es no binario/a” for example.
The point of being non-binary, though, is that they are neither “he” nor “she”. Hence the post.
Also a native speaker here. You can also just not specify “el/Ella” because the context isn’t relevant. I.e. “es no binaria”. You can also just pluralize the person to get around gendered wording, I.e. “ya llegaron” for “they have arrived” rather than “el/Ella ya llego” for he/she has arrived, but this is informal and may sound odd to someone of a different dialect from me, but I think this should at least be intelligible to Latin american Spanish dialects