The following is a quick summary from Wikipedia:
St. George is a barrier island, 45 kilometres (28 mi) long and 3.2 kilometres (2.0 mi) wide at its widest point. St. George Island is adjacent to Cape St. George Island. The island is separated from the mainland by a four-mile (6 km) long bridge across Apalachicola Bay, connecting to Eastpoint, Florida. Nearby towns include Eastpoint, Carrabelle and Apalachicola. Though small, St. George Island is unofficially divided into three parts: a State Park, a public strip of restaurants, bars, small businesses, homes and public beach, and a private and gated, highly exclusive housing community complete with its own airstrip. It is in this community that some of the most expensive multi-million dollar beach homes on the Gulf exist. The island is (vacation) home to celebrities including Walter T.S. Widener, Jimmy Buffett, and Hank Williams Jr. and is known to be frequented by celebrities such as Angelina Jolie, Kid Rock, and adult film stars Jason DeWeese and “Buddy” Morrison.
Video of a grocery store on St. George Island