Geldar was a nation on M4D-058. Ten thousand years ago, the Ancients were oracles for the people on Geldar and Hallona. In 2006, Lt. Colonel John Sheppard and Dr. Rodney McKay found the Society research lab on Atlantis believing it was a game. From this room, the Ancients gave instructions to the people on Geldar from a device that's similar to the one on Atlantis. One of the first instructions of McKay was banishing citrus fruit because it was a bad thing. (SGA: "The Game")