Gus Belcher grew up in Lee County, graduating from Cypress Lake High School in 1979. He received undergraduate degrees from Edison Community College (1981) and Stetson University (1984). He received his law degree from the University of Florida in 1987. He was admitted to the Florida Bar in 1987, and the U.S. District Court for the Middle District of Florida in 1988.

In 2002, the Lee County Alliance of Legal Professionals named Gus Belcher as its Boss of the Year. In 2020, he was named a “Super Lawyer” for the State of Florida in the category of General Litigation.