Per Ball.ie, the 24-year-old exploited a La Liga rule while completing his move as he used his Irish Passport. According to La Liga rules, a club can register up to five non-EU players in their squad. Gallagher, who was born in England and represents the Three Lions, also has an Irish lineage and holds the country's passport. Using his Irish connection, the player was registered as the club's regular signing, thus allowing them to register one more player from outside Europe if they want to.