How come the term GSM isn't often used to describe the LGBTQ community?

GSM = Gender and Sexual Minorities. Or even GSRM/GRM where “R” stood for “romantic.”

If anything, I think “Gender and Sexual Minorities” already best
describe several groups or individuals who don’t identify as straight for the most part. It’s also less long-winded compared to how interchangeable or crazy the acronyms for “LGBT,” “LGBTQ,” “LGBTQ+” “LGBTQIA,” “LGBTQIAAPPQWERTY,” or etc….can get depending on who you ask.

GSM/GSRM on the other hand is already an inclusive term that covers all of the sexual minorities in a broad sense. No one needs to fight over or feel worrisome about this acronym. It’s also not as potentially mouthful to pronounce. So this situation makes me kinda curious about why less people or the media seem to be using this other term?