Following his return from the Philippines, Gasser commanded Company I, 28th Infantry at Fort Snelling, Minnesota, after which he remained at Fort Snelling as a member of the regimental staff. In September 1904, Gasser married Molly Gregory Sugrue of Tiffin. Because they had carried out their courtship in secret, Sugrue left Tiffin after telling friends and family that she was going to visit the Louisiana Purchase Exposition in St. Louis. They were first notified of the wedding by Sugrue's telegram informing them that she had traveled to San Francisco, where Gasser and she were married at the home of Archbishop Patrick William Riordan. They had no children and remained married until her death in 1951.
