Gallus was one of the few who escaped the family massacre initiated by Constantine's sons in order to weed out possible future contestants to the throne. When Constantius II was unable to deal with lesser rebellions out east because more pressing issues required his presence elsewhere, he decided it would be served best if a family member was given the task. So he summoned Gallus, made him Caesar and sent him on his mission. Although he was successful in dealing with the revolts, his methods were found to be so cruel that they would likely renew new revolts. Word of his heavy-handed manners reached Constantius and had him recalled. Gallus never suspected that he was in trouble but would soon find out that he was under arrest. He was sent to an island, tried and executed.
RIC 90 (Antioch) Solidus Obv: DNCONSTANTIVSNOBCAES, bare-headed, draped and cuirassed bust right.
Rev: GLORIAREIPVBLICAE Exe: SMANQ•, Roma and Constantinoplis seated facing, supporting between them shield inscribed VO/TIS/V in three lines.
RIC 299 (Siscia) Siliqua Obv: DNCONSTANTIVSIVNNOBC, bare-headed, draped and cuirassed bust right.
Rev: VICTORIACAESARIS Exe: SIS, Victory advancing left, holding palm and trophy.
RIC 36 (Sirmium) AE3 Obv: DNCONSTANTIUSNOBC
Rev: FELTEMPREPARATIO Exe: ASIRM; Soldier spearing falling horseman.