By 1 August 1150 Gonzalo had married a certain Elvira Rodríguez, a woman of unknown origins, with whom, on that date, he donated his portion of San Julián de Ezebreiro to the Cistercian monastery of Monfero.
[4] Gonzalo held the title of count, pertaining to the highest rank in the kingdom, by 4 February 1155, when he signed a royal charter at Valladolid as comes Gundisaluus.
[5] This scheme is complicated two charters of donation dated 1 July 1155 by Fernando and his brother Vermudo to the monastery they had founded at Sobrado dos Monxes.
If authentic, these charters would push his date of death back a half-year and demonstrate that Gonzalo held the comital rank within his father's lifetime.
Two documents in the archives of Sobrado, dated 1151 and June 1160, are confirmed by a comes dompnus Fernandus in Traua et in Aranga et in Monteroso ("count Don Fernando in Traba and in Aranga and in Monterroso") and a comes dompnus Fernandus senior in Monteroso et in Traua ("count Don Fernando, lord in Monterroso and in Traba"), respectively.