Yes, The Camco RV Water Heater Anode Rod # CAM11563 will work with your Suburban heater in your 2021 Georgetown GT7.
The aluminum anode rod attracts corrosive elements in your RV's water heater, protecting your tank from corrosion. The rod has a 3/4 inch diameter and is 9-1/2 inches long.
I attached a review video link below. view full answer...