Of Fox Chapel on Sunday, October 8, 2023.  Beloved husband of Georgette A. Bellucci-Williamson; father of Jared N. Williamson (Anja) and Lauren M. Nicholson; grandfather of Casey Nicholson and Finn Williamson; brother of Nancy J. Bard (Jeff) and Steven E. Williamson (Cheryl); also survived by nieces and nephews.

Dr. Williamson worked until the day of his death for PSP Metrics, a company of which he was the owner and advisor for over 40 years. He was fond of exercise and was an active Stephen Minister in his church. He adored and was adored by his family.

A service will be held at Fox Chapel Presbyterian Church on Saturday, October 14, 2023 at 2 pm, followed by a reception in the atrium. Rev. Dr. L. Roger Owens officiating. Interment private.

In lieu of flowers, the family suggests donations in Gary's name to World Central Kitchen (donate.wck.org/give/499865/#!/donation/checkout).  Condolences may be left at www.zalewskifuneralhome.com.