There was a long pause as Gladio stares up at John, that very dominant gesture pushing hard at the Sentinel as much as Gladio's own ego. He takes a slow breath as he watches John, emotions flaring up like sparks in a fire. A moment of raw aggression, the wordless feeling of wondering how dare John talk to him like that? Then on its heels comes arousal, because, as he said before, he likes that his Guide isn't some submissive, passive thing. His nostrils flare, pupils going to pinpricks before expanding. When he lets out the breath, the momentary flare of anger is gone and he smirks.

"Deal."

John would then have to deal with Gladio deciding he is getting up, using an easy wrestling move to try and roll John over and onto his back, leaving him above him.