Not that it reflects directly on Chad, but two separate incidents where you don't make out with Sage she attributes it to being gay.
After brushing your teeth on the movie night, if you don't grab Sage's ass she says:
Sage: "How gay are you?"
MC: "What?"
Sage: "Why didn't you grab my ass just now?"
MC: "Did you want me to do that?"
Sage: "No, but I expected you to."
And then at the end of the Preps mansion raid, if you're not involved with Sage she says:
Sage: "I could tell you..."
Sage: "Lock those doors and remove your pants..."
Sage: "I want you inside of me right now..."
Sage: "And you would just say no?"
MC: "That's right. I would just say no."
Sage: "Haha, wow..."
Sage: "If you're not gay, I'm sure the girl you really want will appreciate the fuck out of you."
MC: "Trust me, I'm not gay."
And whilst this doesn't tell you anything direct about Chad, it still gives you an insight into DPC mind, even if he's tyring to channel another character.