Company Description. Gustin, Cothern & Tucker, Inc. (GCT) is a Veteran Owned Small Business based in Niceville, FL, specializing in Surveying Services for Federal and Private Sectors. With a rich history of surveying projects like Home Depot in Destin, Wal-Mart in Niceville, and Kelly Plantation Development in Destin, GCT also has extensive experience working with Federal Clients such as NOAA, NGS, and Army Corps of Engineers Districts. The compa...