Gaston and the third and elder Méliès brother, Henri, ran the family shoe factory in Paris.
On September 11, 1907, he married Hortense-Louise de Mirmont, an elder sister of Lucien Reulos' wife, who was one of Georges Méliès' first collaborators.
[2] The new couple left Paris a few days after their marriage and travelled from Le Havre to New York on the ship La Savoie, where they arrived September 28, 1907.
Gaston was no longer able to fulfill Star Film's obligation to Thomas Edison's company.
He went to California, sold the American branch of Star Films to Vitagraph Studios, and then returned to Europe.
He was buried on April 14, 1915 in Saint-Vincent Cemetery in Montmartre, Paris, in a tomb belonging to his second wife's family, De Mirmont.