Formed at Alavés, he spent most of his career in the Croatian Football League, making over 100 appearances mainly for Istra 1961 and also for Rudeš.

Born in Vitoria-Gasteiz, Álava, Galilea finished his formation with his hometown club Deportivo Alavés, and made his senior debut with the reserves in the 2012–13 campaign.

On 19 May 2013, as the Basque side were already in the play-offs, he made his first team debut, coming on as a substitute in a 3–1 win at CD Izarra.

[1] On 4 January 2014 Galilea made his debut as a professional, again from the bench in a 2–0 success at CD Numancia in the Segunda División championship.

[5] He scored his first senior goal ten days later, netting the second in a 4–0 Tercera División home routing of Santutxu FC.