I think you should stick with Gonzalez. He is most often the #1 option in 3rd and short and goal line throws. He is the 2nd most targeted receiving option for the Falcons.
So what you're sayin is...don't drop Gronk. I currently have Gonzo in my lineup with Mr Zach Miller on the bench with his sore foot. Can you really start Gronk over Gonzo this week?