I watched the replay a couple of times. He sold the deep kick literally until the last moment when he chopped down on the ball with the outside of his foot to pop it up into the air. If you played soccer, you know how difficult that was on a hard run-up. If he had turned his hips to chip that with the instep, it would have tipped the defense off.
Gunter was wide and the only guy looking for the ball. All others on coverage team sold the deep kick. The ball traveled 10.5 yards in the air and landed in Gunter's lap. Perfect execution.