An accomplished Latin stylist, Gilo wrote the majority of the Historia de via Hierosolymitana, a verse history of the First Crusade (1096–1099). He also wrote the Vita sancti Hugonis abbatis Cluniacensis, a biography of Abbot Hugh of Cluny (1024–1109). A couple of letters he wrote in connection with his third legation have also survived and are highly regarded for their style and eloquence.
