Parallel to his task as a conductor, González-Castelao has pursued his career as a Musicologist, devoting his academic and linguistic vocation both to research and to the translation into Spanish of key music history and theory books for Akal Ediciones.
His PhD Thesis in Musicology, completed in December 2007, analyses in detail the life and career of Spanish conductor Ataúlfo Argenta (1913-1958).
González-Castelao has been awarded the Edison Fellowship by the British Library Sound Archive, where he has focused his research on computer-based performance analysis, being one of the first scholars in Spain interested in this field.
He has presented his research in different conferences in Dublin, Barcelona, Madrid, Cáceres, Valladolid and Oviedo, and his articles have appeared in Debats, Cuadernos de Música Iberoamericana, Melómano.
He continued his education attending numerous workshops and courses such as the Tanglewood Music Center (2000) and the Kurt Thomas Cursus (Utrecht), which brought him in contact with teachers such as Paul Van Nevel, Robert Spano, Seiji Ozawa, Julian Reynolds, Ford Lallerstedt and Jos van Veldhoven.