The RX-78-2 Gundam is the titular mobile suit of Mobile Suit Gundam television series. Part of the RX-78 Gundam series, it was built in secret on Side 7. The Gundam would turn the tide of war in favor of the Earth Federation during the One Year War against the Principality of Zeon. It was primarily piloted by Amuro Ray.

The G-Armor is the combined form of the RX-78-2 Gundam with both parts of the the G-Fighter. Due to the G-Armor's ability to quickly deploy the Gundam after transporting the mobile suit, it is the most used combined configuration of the G-Fighter and Gundam.