After studying decorative and fine arts, André Galland started illustrating chilren's books in 1904. In 1908, he created 'Les Aventures d'Achille Costaud' in L'Épatant, using the signature Age. From 1916, he briefly alternated with André Vallet in illustrating Jo Valle's stories of 'L'Espiègle Lili' in Fillette. For this same magazine, he also made 'La Forêt Enchantée'.
Also with Jo Valle, he created 'Ninette et Cloclo' in the periodical Lili in 1919. These stories were collected in two books by S.P.E. in 1924. At the same time, he worked for magazines and journals like Dimanche Illustré, Les Belles Images and L'Illustration, while also continuing to work for the pre-War issues of L'Intrépide.
Between 1918 and 1939, he was also a journalist/illustrator for L'Illustration. In addition, he contributed to Le Petit Journal, Le Journal and Le Matin. An engaged artist, Galland additionally drew for Le Charivari, and was a productive poster illustrator for the republican party. As an advertising artist, he illustrating campaigns for the lottery and Vinet chocolat.
During World War II, Galland made posters for the government of Vichy and sketches for L'Espoir Français. After the War, he covered the Nurenberg trial and founded the Union des Artistes et Dessinateurs Français (U.A.D.F.). He also continued creating comics, this time for Éditions S.A.E.T.L. (published in Sélections de Corsaire' and Pic et Nic), Lucien Dejoie ('Panique au Ranch' in Collection Bizon) and Claire-Jeunesse ('Zar'o').
In 1950, he succeeded René Giffey as the artist of 'Marco, Gars du Voyage' in L'Intrépide. Between 1954 and 1957 he was present at Éditions Artima with 'L'Aigle Blanc' in Aventures Film. From the early 1950s, he created various comic novels for the Paris-Graphic agency, and did contributions to Ima, L'Ami des Jeunes. He also briefly appeared in Tintin, drawing 'Le Fils du Mître de Poste' (1951) and 'Arnould le Croisé' (1957).