The RX-78GP01 Gundam "Zephyranthes" (aka Zephyranthes, GP01, Unit 1) is a prototype general-purpose mobile suit introduced in the Mobile Suit Gundam 0083: Stardust Memory OVA. It was piloted by Kou Uraki. 

Developed as part of the Gundam Development Project, the GP01 was a ground-use general purpose mobile suit intended to be an improvement of the RX-78-2 Gundam, which achieved exceptional battle results during the One Year War. Being an experimental unit, it was equipped with an increased number of sensors, some of which were exposed due to being temporary. Compared to the RX-78, its sensors and balancer were upgraded or redesigned. Overall, the GP01 was designed to allow movement closer to that of a human (a design concept that would eventually evolve into the Movable Frame).

In order to ensure the survival of the pilot and the combat data, the GP01 retained the Core Block System. However, to address the RX-78's structural weakness in the stomach, the GP01 adopted an experimental "horizontal in the body" structure instead of the previously used "vertical in the body" structure. The GP01's main generator, main thrusters, and operation and control instruments were all integrated into its FF-XII Core Fighter II. In addition, when docked, the Core Fighter's beam guns serve as the GP01's beam sabers. Thanks to this design, the Core Fighter's propellant, thrusters, and weapons were no longer dead weight when docked.

By switching the Core Fighter, the GP01 could operate both on Earth and in space, though additional readjustment and maintenance was still needed. Thanks to this design, despite being a general-purpose mobile suit, its performance rivaled or exceeded dedicated ground-use and space-use mobile suits in both environments.