List of DC Comics characters: G

G.I. Robot is the name of a series of six robots that appeared in comic books published by DC Comics. The first four versions of G.I. Robot were all created by writer Robert Kanigher, though each was designed by a different artist. Each incarnation of G.I. Robot is an android of advanced, experimental technology designed to carry out combat and rescue missions. Multiple versions of G.I. Robot seem to develop their own free will, as well as loyalty and a sense of friendship towards human soldiers they work alongside. The first G.I. Robot, nicknamed Joe and designed by Ross Andru, first appeared in Star Spangled War Stories #101 (published in late 1961, with a cover date of February–March 1962).

During World War II, "Joe" the G.I. Robot is handed over to a Ranger unit to be tested in the field. Humanoid, with smooth features, no mouth and a control panel on its chest, Joe is assigned a human "buddy", corporal Mac. In three stories from Star Spangled War Stories #101—#103, Joe and Mac end up fighting "The War that Time Forgot" against prehistoric creatures (and a giant German robot soldier) on Dinosaur Island.

Star Spangled War Stories #125 introduced another G.I. Robot nicknamed "Mac" and his human partner Reed as part of the war-era Suicide Squad, a team specially trained for missions no ordinary soldier was expected to survive. During its first mission, Mac sacrifices itself to save Reed and another soldier from a Tyrannosaurus.

Some time after the destruction of Mac, MIT develops a new version of G.I. Robot with built-in weaponry, more advanced technology, and a more robotic appearance. Thompson's team names this new G.I. Robot "J.A.K.E. #1" (Jungle Automatic Killer - Experimental). For its first mission, J.A.K.E. 1 is deployed to a Pacific island alongside the Marines to fight the Japanese military and placed under the control of Sergeant Coker. Coker initially does not trust J.A.K.E., but comes to respect him. J.A.K.E. later joins the Creature Commandos and sacrifices himself to save them.

Weeks after the destruction of J.A.K.E. 1, his successor J.A.K.E. 2 is sent to the Pacific islands to join the marines there. On activation, J.A.K.E. 2 seems unresponsive at first but then acts to defend the marine camp from a samurai robot built by the Japanese military. After defeating the robot, J.A.K.E. 2 engages in several missions in the Pacific Theater, as well as on Dinosaur Island. Eventually, he also meets the Creature Commandos and is accepted into their ranks. Later on, J.A.K.E. 2 and the Creature Commandos are aboard a rocket that misfires and heads into deep space. The Creature Commandos are known to have survived, but J.A.K.E. 2's fate is unknown. The DC Comics Encyclopedia describes J.A.K.E. 2 as having survived into the 31st century.

In Checkmate (vol. 2) #24, a new G.I. Robot is revealed, with the designation J.A.K.E. #6.1. It is one of the organization's Rooks, a team of four elite operatives of last resort. Apparently constructed using the original World War II era programming, it has a new body made of components formerly used by Maxwell Lord during a time when his consciousness was contained in an android form.

A new G.I. Robot of unknown origin appears in the 2008-2009 The War That Time Forgot miniseries written by Bruce Jones, where it is known as "Lord Job", but calls himself "Joe". This version can speak and has bright red eyes, but is otherwise of a similar appearance to the earlier models, particularly Joe.

The G.I. Robots are all fully autonomous mechanical soldiers, capable of making decisions and adapting to changes in their environment. J.A.K.E. 1, J.A.K.E. 2, and J.A.K.E. #6.1 are equipped with a minigun in their left arm, with J.A.K.E. #6.1 also possessing a grenade launcher mounted on its right shoulder and caltrops deployed from its chest cavity.