On his first legatine visit, Guy was present for the foundation of the Confraternity of Belchite by the Navarro-Aragonese king Alfonso the Battler.
[1] In 1134, Guy took part alongside Alfonso's forces in the Battle of Fraga, where he was captured by the Almoravids and imprisoned in Valencia.
On 9 October 1138, Guy, acting as Papal legate again, confirmed, ahead of the local archbishop, Diego Gelmírez, the foundation of a nunnery at Genroso by the nobleman Bermudo Pérez de Traba.
Guy placed his own autograph at the bottom of the document, next to the text: "I, Guy, bishop of the church of Lescar, praise and confirm this above written page for the honour of God and the Holy Virgin and for the perpetual sustenance of the other servants of God, and legate of Rome I make this sign [signature follows].
[5] The Historia compostellana, a contemporary account of Diego's episcopate, portrays Guy as the archbishop's ally in his conflicts with the saecular powers of Spain.