Robert S. Gruss, 35, of San Antonio, TX passed away on December 21, 2021 he was born May 16, 1986 in Elgin, IL. He was a graduate of Hampton University with a Bachelors of Science in Flight Education and was an avid pilot and flight instructor. Survived by his wife Kelli Gruss, his father Bob Gruss and stepmother Lauren Gruss, his mother Mary Seifert. He was preceded in death by his grandparents Bruno and Dorothy Gruss, and uncle Ron Gruss.   Memorial Services will be held at 12:00 Noon on Saturday January 8, 2021 at Wait Ross Allanson Funeral & Cremation Services, 201 S. Main St, Algonquin, IL. Visitation will be on Saturday from 11:00 AM until time of services.