Answer:
Not officially. He has never admitted as such and it's been speculated because he's never been married or seen with girlfriends, that he's gay. Than again, he has never been officially attached to any men either. Nobody has given any evidence of him being with men or any gay man declared he was Jim Nabors lover. Jim has said he's been married to his work and never had time to get married! This leaves it all up to speculation, is he a closeted gay man? Has he been with women but no public relationships? Or is he asexual? There is no sure answer, only a lot of guesses!