There is one implication that Loras sleeps with Renly, because in "A Feast for Crows", Jaime threatens Loras by saying he'll shove a sword so far up Loras's rear that it'll reach somewhere even Renly never found.

The TV show created POV sequences that weren't in the books directly, but based on excerpts. Renly with Loras, and Renly with Margaery were never discussed in the books.

I've ever read that Jon Connington was allegedly in gay love with Rhaegar Targaryen, as he referred to him as "My Silver Prince".

Oh also, if only Daenarys knew how her beloved Mad King daddy treated her own mother at night after burning someone alive, how he ravaged her while Jaime Lannister had to stand guard outside, listening.