G.E.C.K.


 * Garden of Eden Creation Kit, a terraforming device created by Future-Tec, a division of Vault-Tec Industries and in-game item featuring in Fallout 2, Fallout 3, Fallout Tactics 2 and Fallout: Brotherhood of Steel 2.
 * G.E.C.K. (editor), the official editing software for Fallout 3 and Fallout: New Vegas.