SCR-GP is a playable character in Sonic Riders: Zero Gravity. It is unlocked after the Babylon Rogues story is completed. Like SCR-HD, it does not ride an Extreme Gear, but spins in a wheel as it were a Gear itself and functions like a Wheel Gear. It is a Power Type character.
It is first seen in the intro cutscene when the mass-produced SCR-GP and their leader, SCR-HD are activated by one of the Arks of the Cosmos. They are next seen when they attack Sonic and friends on their way to Megalo Station. They also chase Sonic's team and the Babylon Rogues through MeteoTech after the teams raise an alarm. After this, the SCR-GP robots are not really seen, as the rest of both stories center on SCR-HD and Eggman. Like the rest of the playable characters in Sonic Riders: Zero Gravity, SCR-GP can perform Gravity Dive and Gravity Control.
As a Wheel type Extreme Gear, SCR-GP can crash through obstacles and barricades without slowing down, gaining Gravity Points (GP) for each destroyed obstacle, and make Slide Turns, similar to Air Slides in Sonic Riders, to get through sharp corners. However, it cannot perform Gravity Control to the full extend as most other Extreme Gear. It also does not have any Gear Parts.
- These droids have a similar ability to roll like Droidekas in the Star Wars series, having a similar body structure to the Droidekas.