Gabe does an amazing job of creating separation using his size. The TD against KC showed him making a move at the line and then knocking the defenders hands away from him. Then while running full speed, he adjusts his speed (slows down just a bit) to make sure he catches the ball right as he is about to hit his stride again. this did allow the DB to catch up to him but he used his reach to keep the defender away as he started to top out.
I don't know if they could/would throw a flag for OPI on that but the nice part is, if the DB even thinks about grabbing that arm, the flag is coming out for sure.