Exposing my own ignorance here, but is “gay” necessarily gendered?

The difficulty of answering that question, and the fact that both “yes” and “no” are both valid answers that individual people of every gender could sincerely give, are two of the reasons why “queer” has become more popular than “gay” as an umbrella term. The people who do think “gay” as an umbrella term is gendered prefer the word “queer”, while the people who don’t think “gay” as an umbrella term is gendered are not upset by the word “queer”.

Another reason that “gay” isn’t used as an umbrella term is because it’s also a specific term. Imagine being a man and saying “I’m gay” and having someone ask you, “ok but are you gay or are you gay gay?”. Sexuality and gender are already sensitive and difficult things to explore, so removing ambiguity from the language surrounding those topics will make things clearer and easier for everyone involved.

That being said, you should always respect the way that people want to be identified. If you know a lesbian woman that identifies as “gay”, then just accept it and use it while understanding that not every lesbian woman will feel the same way.