From the introduction:
Well, welcome back once again Jumper. Lots of these to get through, aren’t there? Don’t worry; I’m here to help you along the way! (Whether you think I’m nice or not.)
Anyways, welcome to the first-made Gundam Alternate Universe, in the first AU Century in the first AU Series. This one is a full-on super robot anime, for you are heading to G Gundam, where Gundam Battles decide who runs Earth from space for a while before going down and destroying it with a Gundam Battle again! The story’s protagonist is one Domon Kasshu, who is forced to be Neo Japan’s Gundam Fighter in order to clear his father’s name and free him from the cryogenic sleep he was sentenced to as penance for his crimes against humanity.