In 350 AD, under the usurper Vetranio, Gomoarius was a tribunus notariorum scutariorum.
In 359 AD he was raised by Constantius II to the title magister armorum.
In 365, he served under Agilo, the magister militum under the usurper Procopius.
Gomoarius later defected from Procopius to the rightful emperor Valens, helping the latter to his victory at the Battle of Thyatira in 366 AD.
This biographical article related to the military of ancient Rome is a stub.