The First Order All Terrain Gunnery Platform, designed to support troopers in battle. A color modification of the AT-DP microfighter.
About this creation
In order to give stormtroopers extra support on the battlefield without placing too many resources (defense walkers, TIE fighters) into an operation, the First Order commissioned the AT-GP, an All-Terrain Gunnery Platform. Staff and stormtroopers alike frequently joke that an AT-GP is essentially legs and a seat built around a single SFJS L-s9.6 cannon, which beforehand had been designed solely as the forward gun(s) to First Order TIE fighters.
As an AT-GP does not have the same complexity and facilities of a TIE fighter, it can only carry one of the often dual-mounted cannons. The semispheres built into each side of the platform are cooling mechanisms to allow for continued fire, while the rest of the interior is reserved for power cells and machinery. Despite this, the platform is still equipped with an ejector seat to preserve the life of the pilot.
Despite its small appearance and exceptional speed and agility, the AT-GP is not well suited for reconnaissance as it is. Its standard communication equipment is meant to provide necessary coordination with nearby troopers on the battlefield, and not to broadcast the locations of enemy troops and encampments from a distance. A variant meant for electronic warfare is under development, as is a special forces variant equipped with two cannons and shields.
As you can see, the AT-GP is functionally identical to the AT-DP microfighter. The only changes made were to the coloring. It seemed fitting for a First Order Crew to pilot it, because stormtroopers would be on the ground and not trained to handle weaponry any larger than a megablaster.
And yes, it's hard to see, but there is a First Order Crew piloting it.