Gaines was among the fifth generation of his sharecropper family to be born on a plantation in Pointe Coupee Parish, Louisiana. That became the setting and premise for many of his later works. He was the eldest of 12 children, raised by his aunt, who was crippled and had to crawl to get around the house. Although born generations after the end of slavery, Gaines grew up impoverished, living in old slave quarters on a plantation. Gaines' first years of school took place in the plantation church. When the children were not picking cotton in the fields, a visiting teacher came for five to six months of the year to provide basic education. Gaines then spent three years at St. Augustine School, a Catholic school for African Americans in New Roads, Louisiana. Schooling for African-American children did not continue beyond the eighth grade during this time in Pointe Coupee Parish. When he was 15 years old, Gaines moved to Vallejo, California, to join his mother and stepfather, who had left Louisiana during World War II. His first novel was written at the age of 17, while Gaines was babysitting his youngest brother, Michael. According to one account, he wrapped it in brown paper, tied it with string, and sent it to a New York publisher, who rejected it. Gaines burned the manuscript, but later rewrote it to become his first published novel, Catherine Carmier. In 1956, Gaines published his first short story, The Turtles, in a college magazine at San Francisco State University. The next year he earned a degree in literature from SFSU. After spending two years in the Army, he won a writing fellowship to Stanford University. From 1981 until retiring in 2004, Gaines was a Writer-in-Residence at the University of Louisiana at Lafayette. In 1996, Gaines spent a full semester as a visiting professor at the University of Rennes in France, where he taught the first creative writing class ever offered in the French university system. In the final years of his life, Gaines lived on Louisiana Highway 1 in Oscar, Louisiana, where he and his wife built a home on part of the old plantation where he grew up. He had the building where he attended church and school moved to his property. Gaines died from natural causes at his home on November 5, 2019. He was 86 years old.
The F. Scott Fitzgerald Award for Achievement in American Literature award that is given annually in Rockville, Maryland, the city where Fitzgerald, his wife, and his daughter are buried as part of the .
A book award established by donors of the Baton Rouge Area Foundation in 2007 to honor Gaines' legacy and encourage rising African-American fiction writers. The winner is selected by a panel of five judges who are well known in the literary world. The winner receives a US$10,000 award and a commemorative sculpture created by Louisiana artist Robert Moreland.