Yeah, well, almost every game ever written (OK there are a few exceptions) can find someone to play it. I'm sure there's someone out there running an original Metamorphosis Alpha game, for example, to name one rather obscure and long 'dead' RPG.GURPS at least gets regular support, a new thing a month and Pyramid now going 100% GURPS is getting a kickstarter. Now my very favorite system Unisystem (Buffy/Angel and All Flesh Must Be Eaten) which is set to have anew core book Beyond Human is still stuck in design hell where it has been for years. I also ran a decent GURPS game in 2018 and several before that so its getting players.
And yeah, I'm sure GURPS is a bunch more alive than that. I know SJ has provided some stuff in the last 10 years, but its not exactly an evolving and upward trending game these days. It has its fans, though TBH I personally would opt for more modern game engines. For example I used D6 Space (the genericized version of the old d6 Star Wars system) when I wanted to run a little Space Opera. Frankly, GURPS takes a lot of reading and digging up out of print material to really use, plus I'd rather have more player-focused narrative mechanics vs a really old-school 'DM generates all the fiction' sort of experience. That is just me though.