[3] He became close with composer Maurice Delage in 1948[4] and compiled a catalog of his works.
[4] His biography of Ernest Chausson earned him the Grand Prix Bernier from the Académie des Beaux-Arts.
[5] His book, Les Polignac, mécènes du xxe siècle, was honored by the Institut social de France et de l'Union européenne.
Gallois created the collection Horizons with Bleu nuit, which he directed until 2008.
[6] He was also a member of the Académie Charles Cros[7] and the scientific committee of the Musée Eugène Carrière.