No. The GTR electrical components are a different shape and size and cannot fit our earlier board designs.
The Bluetooth R2 remote can only communicate with the GTR Bluetooth motor controllers. The GT boards use WIFI communication when operating, the GTR uses Bluetooth communication when operating. If these remotes are swapped then the remote cannot pair to the motor controller.
The GTR motors have custom water proof connectors and can only connect to the GTR Bluetooth motor controllers, they will not assemble to the GT motor controllers.