Sort of. The original actor that was inside the C3PO suit (Anthony Daniels) is queer as a three dollar bill.
Actually, Anthony Daniels has a 42 year old son, and is currently married to a woman named "Christine"...
...and he is still (so far as IMDB says) the guy in the C3PO suit!
(He's not gay, he's British. Confusion is understandable.)