George Fitzsimons was born in Kansas City, Missouri, to George K. and Margaret Mary (née Donavan) Fitzsimons, both native Kansans.[1] He belonged to St. Francis Xavier Church as a child, and attended Rockhurst High School and Rockhurst University in Kansas City.[1] Various lay ministries that were expanded and developed included Liturgists, Religious Education Coordinators, Youth ministers, Ministers to the elderly and Pastoral Assistants. In 1952–53, before joining the priesthood, Lt Fitzsimons served as a naval aviator with U.S. Navy Patrol Squadron VP-49. After serving in the U.S. Air Force (1950–1954) and briefly in business, he began his studies for the priesthood at Conception Seminary in Missouri.[1]
During his tenure, he established an Office of Lay Ministry, with a director and an advisory Board, funded and initiated by the Catholic Church Extension Society in Chicago, as well as a Rural Life Commission. He initiated the RENEW parish spiritual growth program.[1]Marymount College closed in 1989 because of financial difficulties.[1] Due to a declining population and priest shortage, he was also forced to merge several parishes but did erect St. Nicholas of Myra Church in Hays and St. Thomas More Church in Manhattan.[1]
After reaching the mandatory retirement age of 75, Bishop Fitzsimons resigned as Bishop on October 21, 2004.[2] Bishop Emeritus Fitzsimons then resided at St. Patrick Parish in Ogden. In 2008, his lower left leg was amputated due to a severe infection; he then used a prosthesis.[1]