His figurative style was inspired by Spanish painters including Diego Velázquez,[1] Zurbarán, Goya, Zuloaga[2] and the Mexican Baroque.

Gaillard received his degree from the École nationale supérieure des arts décoratifs (ENSad) on the rue d'Ulm in Paris.

Ex-projection with Philippe Schiepan at the Église des Frères prêcheurs,[19] Terre et Pierre, Hôtel de l’Amphithéâtre, and La Maison Close in Arles.

[20] Galérie Dom-Art in Dax; Sophie Jullien gallery in Béziers; Galerie Éloge de l’ombre in Uzès.

Internationally, his work has been shown at the Centre Albert Camus in Madagascar; at the Connoisseur Art-Gallery in Hong Kong and Singapore;[21] at Art Miami, the Ambassador Gallery in New York City, at Jones-Terwilliger Fine Arts in Carmel; at the Green House Gallery in San Antonio; at Art-Catto in Portugal.

In 2006, Gaillard was chosen to illustrate the entry tickets for a bullfighting season in San Isidro, Plaza de toros Las Ventas, Madrid, Spain.

The Museum of Taurine Cultures Henriette and Claude Vialat has a number of Gaillard’s in its collection including Marie Sara en traje corto bleu and Nimeño II.