Born in 1887 in Alsace, Gaston Lévy graduated in Pediatrics from the Faculty of Medicine of Paris in 1930. Combining medical practice, humanitarian commitment, and Resistance activities, he was already involved before the war in Jewish mutual aid and relief organizations.

In 1939, he served as a medical lieutenant in a heavy ambulance unit in the combat zone. Demobilized on 22 June 1940 in Pau, he moved with his family to Béziers in the free zone, where he practiced as a pediatrician and became president of the new Jewish community in 1941. He stopped practicing after the enactment of the Jewish Statute in 1941.

Gaston Lévy settled in Limoges in February 1942, an important center for refugees and displaced populations in the unoccupied zone. As a medical inspector for children's homes of the OSE (a Jewish relief organization) and a doctor at the Limoges nursery and the Poulouzat house, he provided direct care to children. He facilitated connections between various aid networks providing food, medical care, and shelter. During the first roundups of August 1942, children from the nursery were arrested under the pretext of family regrouping. Aware of the threat of deportation, Gaston Lévy decided to hide the children under false identities in foster families in the Indre department.

At the same time, he contributed to the distribution of aid, the organization of assistance for internment camps, and the broader coordination of support for Jewish populations under Vichy and German control.

Wanted by the Gestapo, he secretly crossed into Switzerland at the end of May 1944. As a refugee doctor, he was tasked by Swiss authorities with medical supervision of homes in Lausanne and French-speaking Switzerland.

In October 1944, he returned to Paris and resumed his pediatric consultations. After the war, Gaston Lévy continued his commitment to humanitarian and social work. He remained active in Jewish community organizations and participated in rebuilding assistance networks for survivors and displaced persons in the post-war period.

Gaston Lévy died in 1990 in Jerusalem.