Gobotron

Gobotron is Primus's incarnation for the universal streams labelled Gargent. One would be unsurprised to know that the planet is home to transforming machines who are having a civil war, but these guys are actually the cyborg GoBots, with the Guardians police force protecting from the constant Renegade insurgencies.

Timelines
When a Cataclysm began to threaten the very existence of the universe, the inhabitants of Gobotron ceased their conflict, united with Earth, and held an emergency summit. It was decided to send a combined team to the 22nd Level, the dimension causing the disaster, and try to reverse the damage.

Ask Vector Prime
In the universal stream Gargent 984.08 Alpha, Gobotron is the body of Primus. It was menaced by the Unicron of this universe, who had taken a body with an organic brain a la the GoBots themselves. Unicron would, somehow, get kicked out into another universe.

The Evil One, this reality's version of Megatronus Prime, nearly destroyed Gobotron with the Dark Heart. He was eventually trapped under the Nazca Lines on Earth.

Knights of Unicron
Baron Von Joy's, located on Planet Gobotron, was the seventeenth venue for the Knights of Unicron on their 2014 "Till All Are One" tour.