Guillaume François-Gabriel Lépaulle (21 January 1804, Versailles – 28 August 1886, Aÿ) was a French painter associated with the Barbizon school.
He was a student of Jean-Baptiste Regnault, Horace Vernet and Jean-Victor Bertin at the École nationale supérieure des Beaux-Arts.
Over the next few years, he became a regular annual contributor, with a profusion of subjects, based on his extensive travels to Spain, Italy, North Africa and Turkey.
He also exhibited at the Exposition Universelle (1855) Despite these scenes, ranging from the tragic to the picturesque, to the humorous, most were judged to have little merit.
He is also known for his decorative paintings at the churches of Saint-Merri and Saint-Vincent-de-Paul, as well as designing costumes for a performance of Robert le Diable, by Giacomo Meyerbeer, at the Paris Opera in 1835.