Gabriel Jones grew up in New York City and won acclaim at an early age as a jazz trumpet player. Jones was coached in trumpet playing by the legendary Louis Armstrong himself. Jones's Uncle Bill owned a nightclub in Manhattan and presumably Gabe Jones played in the band there
Jones eventually entered the army under circumstances that have yet to be recorded. His skill and bravery as a soldier came to the attention of Colonel Sam Sawyer and G-2 (Army intelligence), who were organizing the special commando unit that became known as the Howling Commandos, led by Sergeant Nick Fury. Jones was selected to become a member of the Howling Commandos and served with them throughout World War II (Apparently Sawyer was ahead of his time in his attitude towards race, for other army units were not integrated during World War II. Hence, it was highly unusual for Jones, a black man, to be assigned to the Howling Commandos which was otherwise composed entirely of white men.)
Jones re-enlisted in the army after the outbreak of the Korean War and was assigned to the reunited Howling Commandos. Jones joined the Howlers again, as a civilian, for a special mission in Vietnam during the 1960s.
It is not definitely known what Jones did during the years after World War II when he was neither involved with the Howlers or with the law enforcement and intelligence agency S.H.I.E.L.D. Presumably he continued his career as a jazz musician.
It is also not known how Jones came to join S.H.I.E.L.D., but presumably he did so after his former sergeant, Nick Fury, was made its Public Director. Jones became one of Fury's closest aides, assisting him in running the entire organization and acting as an operative on major missions. Jones's most celebrated solo assignment was his infiltration of the first subversive organization known as the Secret Empire, which he succeeded in defeating, from within.
At one point in recent years Jones said that he was engaged to marry Carla Williams, whom he had met during World War II when she was performing as a nightclub singer under the name Carla Swain. Jones was assigned to rescue her from Nazi-occupied Paris, and he and the Howlers saved her life from a Nazi officer. For a time Jones was also romantically involved with Peggy Carter, a former member of the French Resistance. It is not known whether Jones ever marred either of these women or someone else. At present however, Peggy Carter is unmarried
Jones was one of the few high ranking S.H.I.E.L.D. agents who was not killed and replaced by one of the artificially created human beings called the Deltites. Even after the Deltite leader had Fury declared to be a traitor to S.H.I.E.L.D., Jones remained loyal to Fury. Finally, Fury and others defeated the Deltites and Fury persuaded the United Nations disband S.H.I.E.L.D.
Jones was one of the agents who accompanied Fury in traveling through the world, closing down S.H.I.E.L.D. offices, discharging their remaining personnel and destroying S.H.I.E.L.D.'s more dangerous technology.
Since then, Jones has become a member the new, efficient S.H.I.E.L.D. organization that Fury founded to take the place of its predecessor.