The Cop was the only one who wasn’t gay.
Victor Willis (the Policeman) and Glenn Hughes (the Biker) were straight while Felipe Rose (the American Indian), Randy Jones (the Cowboy), David Hodo (the Construction Worker), and Alex Briley (the Military Man) were gay.
But they're usually wrong about stuff. The group went on for a while and there were a lot of other members down through the years who may or may not have been homosexual.
As kids, we didn't like them, but we assumed all disco was "gay". America was surprisingly accepting of the group. For one thing, the songs were as much (or more) a joke about homosexuals as anything positive. For another, the topic was less politicized back then. It was part of how people lived in San Francisco or Manhattan and didn't have anything to do with how things were in the rest of the country.