Gamma III was a planet located somewhere in the space of the galaxy's Alpha or Beta Quadrants, the third planet in orbit of the Gamma star system.
History and specifics
By the 23rd century, Gamma III fell within the bounds of Federation space, near the Federation-Klingon Neutral Zone. A variation of the Kobayashi Maru scenario at Starfleet Academy has a mission objective to deliver cargo from Gamma III to Meridian IV. (ST video game: Starfleet Academy)