Gimel was the artistic director of the literary review Tentatives with Henri Petiot (Daniel Rops) for a special edition dedicated to Stendhal.
His talent was noticed very early on by Andry-Farcy, curator of the Museum of Grenoble, who supported the “Peintres Modernes”, and by the art critic Félix Fénéon.
In January 1934, his religious frescoes were exhibited at the Galerie Jean Charpentier, together with the lithographs for the Station of the Cross with an introduction by Léon Daudet in the Editions Jeanne Bucher.
When architect Henry Jacques Le Même designed his chalet "La Fresque" at Megève, Gimel decorated the façades with avant-garde frescoes.
Later, thanks to the Ministère des Affaires Etrangères, several of his enamels were sent abroad to Rome (Italy) and Saarbrücken (Germany), while others were part of a traveling exhibition in the United States that started at the Yale University Art Gallery in 1954.
He was also asked by the Rotary-club des Alpes de Haute-Provence for a major conference on the subject of enamels, assisted by his friend Jean Giono.