Gustave Singier was born on February 11, 1909 at Warneton, West Flanders Belgium. Arriving in Paris in 1919, he attended the École Boulle from 1923 to 1926 and worked from 1927 to 1939 as a shopfitting designe for department stores. During this period he began painting seriously. In 1936, he met artist Charles Walch who introduced him to the Parisian art world and began he began to exhibit in the Salons.

In 1939, he met his neighbor, Paris School artist Alfred Manessier and became friends with Elvire Jan and Jean Le Moal. In 1940 he was conscripted into the Belgian army and he was sent to Bagnols-sur-Cèze after the invasion of Belgium. From 1941 to 1944, he worked in the carpentry workshop of his father.

Singier took part in the exhibition of Twenty Young Painters in the French Tradition organized in 1941 by Jean Bazaine, the first painting exhibition of avant-garde during the Occupation. Despite being “Degenrate” the term “Traditional” allowed the show to escape censorship by Vichy. He took refuge in 1944 in Manessier, France with Elvire Jan, Jean Le Moal, Jean Bertholle, writer Camille Bourniquel, sculptors François Stahly and Stephen Martin. In 1945, he exhibited at the Salon de Mai and became a naturalized French citizen in 1947. He had his first solo exhibition at Galerie Billiet-Caputo in 1949 and Myriam Prevot - Gildo Caputo’s Galerie de France then exhibited his work regularly.

From 1951 to 1954, Singier taught at the Académie Ranson, and from 1967 to 1978 at the École Nationale Supérieure des beaux-arts in Paris. He was a founding member of the Salon in 1975 in Toulon, and in 1976 the Salon de Vitry-sur-Seine. Singier made many cartoons for tapestries and stained glass, mosaics, costumes and set designs (including the NPT of Jean Vilar and the Paris Opera). He also illustrated several books with his engravings or lithographs .

Gustave Singier died 0n May 5, 1984 in Paris and is buried in Montparnasse Cemetery.