Man-mountains like Stallone and Schwartzeneggar were not yet in style, so they had lean, muscular bodies, hairy chests, thick wind-blown 1970s hair, 1970s gold chains, and sometimes a moustache. They mostly looked alike; I dare you to distinguish between Gil Gerard and Robert Ulrich at a distance.
They lived in glamorous locations like Hawaii and Las Vegas, had unlimited incomes, and solved crimes. But unlike the suave gay couples of the early 1960s, they didn't come in pairs. Indeed, the premises seemed deliberately designed to eliminate homoerotic buddy-bonding.
Trucker BJ (Greg Evigan) of BJ and the Bear (1979-81) hung out with a chimpanzee.
There's a Tom Selleck hookup story on Tales of West Hollywood.
Jim Rockford (James Garner) was an exception, an antihero who lived in a ramshackle trailer.
Douglas Barr). But the homoerotic potential was minimized by making Howie a comic relief character, and adding a stunt woman buddy, Jody (Heather Thomas), to the mix.
There was some beefcake, of course, but it was overwhelmed by the endless scenes of women with enormous breasts.
A couple of episodes involving homicidal drag queens (one tries to kill the British Prime Minister on Magnum, and on Vega$, she tries to kill her own "male side," however that would work). Otherwise no gay characters.
It's no wonder that most gay teens watched Laverne and Shirley instead of Buck Rogers, Barney Miller instead of Magnum, and ran whenever Lee Majors came on the screen.
The actors have a spotty record concerning gay people. Tom Selleck has been denouncing gay rumors, loudly and angrily, for 30 years. Gil Gerard came out in support of Chick-Fil-A's homophobia. Lee Majors has been mostly silent, although he did play Grace's Dad on Will and Grace.