When I read Stonegate, it seemed as if the condom debate had already happened (at least in my mind). Most of the characters had been friends/lovers for years and to me it felt as if they were comfortable enough with each other to not use condoms.
I understand how Gabriel didn't want to interrup the flow of the scene by having the men stop and use protection. I would have liked to have seen a mention of condom when new guys joined the cast, such as TJ or the cowboy Sean and Vincent picked up.