Gabriel doesn't know anything more than what he's observed about Peter's fear of the paranormal, so this sudden interest in verifying his humanity seems odd. Still, he'd just told him he's human, right? That's the truth.

When he receives the prayer, he chuckles. "Despite the mess I left at your place, I'm not actually your own personal booze-delivery service." Nonetheless...might as well cement that it works. He materializes a martini glass full of Midori and offers it up to Peter.

And no, he's not going to tell Peter he doesn't have to do the pose to get a prayer through.