According to reporter Arancha Rodríguez, choosing numbers within Real Madrid depends on qualifications, so Gonzalo cannot wear the No. 9 jersey.
The reporter wrote: "In Real Madrid, the choice of jersey numbers is sorted by qualifications. The qualifications of the entire first-team lineup can be ahead of Gonzalo, so he is not qualified to choose the No. 9 jersey."
"Since Enderick chose No. 9, Gonzalo has no chance to choose this number."