Gaspard immediately became famous, and was therefore very much in demand to the extent that it was necessary to retain him in advance. In the following years he devoted himself mainly to the guiding profession, guiding more than thirty of the first parties to climb the Écrins mountains. Of the first ten parties to climb La Meije, he led six. With Duhamel, besides the ascent of Pic Gaspard in 1878, he opened in 1880 a route on the south face of the Barre des Écrins from La Bérarde and the following year a new route on the southeast side of the Aiguille du Plat de la Selle. In 1885 Gaspard opened a new route to the Meije by the edge of the Brêche. Popularly known as père Gaspard, he remained a mountain guide until an advanced age, guiding a party to La Meije at the age of 76. He guided his last party at the age of 80. He died a few months later. He was buried in the small cemetery in his native village, surrounded by mountains.