Guérin studied with Gustave Moreau in the l'École des Beaux Arts à Paris, and had one exhibition at the Grafton Galleries in 1910; in a review Huntly Carter wrote of his "daring extravagance" and that he "show[ed] how the strongest primary colours can be used without crudity, and whose work has a decorative value which the average muddy and colourless work of our day does not possess".
[1] Guérin attained some historic notoriety for sitting on the jury of the Salon d'Automne of 1908, which rejected almost all of the paintings of Georges Braque.
The other jury members were Henri Matisse, Georges Rouault, and Albert Marquet,[citation needed] all of whom had also been students of Moreau.
[2]: 254 p. The jury's action caused Braque—who had been a great success the year before—to withdraw completely from the Salon.
[5][6] Two works by Guérin, loaned by his dealer and gallerist Eugène Druet, were exhibited in the seminal 1913 Armory Show of Modern Art in New York City.