Former Hattiesburg mayor passes away July 29, 2008 at 3:40 PM CDT - Updated July 1 at 12:15 PM Hattiesburg Mayor Johnny Dupree has ordered the flags at City Hall flown at half staff in honor of former mayor G.D.. Williamson who passed away Monday morning. Williamson, 81, died at Forrest General Hospital following a lengthy illness. Williamson served as a city councilman for 16 years before being elected mayor in 1985. He served for one term. Funeral services are incomplete at this time. Moore Funeral Home is in charge of arrangements.