A priest of the church of Alexandria, where he served as general treasurer, and later as bishop, died at Nola after 484. In 481 he was sent by Bishop Timothy Salophaciolus to the Emperor Zeno to secure the appointment of a Catholic bishop to the see.
Upon Timothy’s death shortly thereafter, G. was canonically elected (April 482). This displeased Acacius of Constantinople, who worked through the Emperor against G., accusing him of Eutychianism and perjury. G. was then forced to leave his church and was replaced by Peter the Fuller, a manifest heretic, who also accepted Zeno’s Henoticon. G. first retired to Antioch, then to Rome, where he presented his complaints to Popes Simplicius and Felix III. Despite the latter’s vigorous protests to the Emperor to secure justice for G., nothing came of it; indeed, matters worsened when the papal legates defected and accepted communion with Acacius and Peter, who were therefore excommunicated, giving rise to the well-known Acacian schism. G. was sent to govern the church of Nola, where he died shortly afterward.