Gideon is a fictional character, a mutant supervillain appearing in the Marvel Comics universe. He was created by Rob Liefeld and Fabian Nicieza. Gideon was a member of the Externals, a unique type of immortal mutant, and an adversary of the X-Men spin-off group X-Force.
Over several centuries, Gideon was able to amass a vast personal wealth. He also encountered and allied himself with several other Externals. He became the owner and CEO of Ophrah Industries in Denver, Colorado. At the end of the 20th century, the group began to seeking out their newest member, whom Gideon erroneously believed to be Roberto da Costa, a young mutant who had joined the New Mutants, the junior division of the X-Men, and taken the codename Sunspot. Gideon had known Roberto from a young age, having business relations with his father, a wealthy Brazilian businessman. Gideon had his servant Eve poison Roberto's father Emmanuel, and Gideon approached the boy, telling him he needed to take over his family's business. He took the young boy in under his wing and began to mentor him.
Gideon later had AIM recreate Proteus. Gideon and Sunspot were later held captive by Arianna Jankos, Black Tom Cassidy, and Juggernaut. Gideon then publicly declared Cable and X-Force to be criminals. Gideon also clashed with and defeated the group of young superheroes known as the New Warriors, while mostly naked. He then spent some time brutally torturing them for various reasons.
Gideon mentored Sunspot for a short while, until it was discovered that not Sunspot but his New Mutants teammate and best friend, Samuel Guthrie (a.k.a. Cannonball) was the new External they had been seeking. Gideon met with the other Externals, and proposed to send Crule to capture Cannonball. He contacted Crule, and then gave Sunspot over to one of his scientific labs, where they experimented on him and augmented his powers (at the great risk of killing him). Gideon forced Cannonball to promise not to interfere with External affairs in return for Sunspot's life.
Gideon attempted a hostile takeover of Genetech and the Taylor Foundation, but was thwarted by Night Thrasher and was defeated by him in physical combat. Gideon witnessed the External Nicodemus's death. Gideon was then offered a position with HYDRA, but refused and battled a HYDRA strike force. He was aided in defeating them by Nick Fury and S.H.I.E.L.D. Gideon was attacked and captured by X-Force, who then rescued Boomer, Siryn, and Warpath.
Gideon was an External, whose aging process is greatly retarded and who can apparently regenerate injured or missing cells from even near-fatal injuries. He was granted with limited immortality, only ended by an extremely mortal wound such as decapitation, by the Legacy Virus (two Externals died by this method) or, in the case of his death, by a draining of the life energies.
Gideon is an extraordinary business strategist.
He wears body armor, and has access to androids, advanced vehicles, and other advanced technology developed by Ophrah Industries.