At the same time, Gildo had a quarrel with his brother Mascezel, who was obliged to flee to the court of Honorius; Gildo took revenge on his brother by killing his two sons.
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In 386, Theodosius I appointed Gildo Comes Africae and Magister utriusque militiae per Africam, as reward for his support to his father Theodosius the Elder in the suppression of Firmus' revolt.
He led the first Italian ascent of the Eiger north face in 1962, together with Pierlorenzo Acquistapace, Gildo Airoldi, Andrea Mellano, Romano Perego and Franco Solina.