I'm pretty sure you can still use gay in it's original meaning. I see it used quite often. Giblet? I only know that as the part of fowl and hadn't heard it used as anything else and could find no reference to gays in a brief search. Many English words have multiple meanings. I'd say go with what feels right in your writing.

Gay i BisexuaLEsbianTransgendered or whatever they are calling themselves nowaday. I now see a "Q" which I guess stands for "Queer" which used to be a bad word. Whatever happened to the idea that what one does in his/her spare time is his/her own business so long as he/she does not scare the horses? The sex-identity agitprop is coming up with more neologisms than the abortion industry, those great guys who came up with the phrase "products of conception". That means you and me, folks.