Gregory Mark Guidry, born on January 23, 1954, in St. Louis, Missouri, is an American singer-songwriter who began his musical journey as a child playing piano and singing gospel. As a teenager, he sang in a band with future Doobie Brother Michael McDonald. With the help of Rich Lang, a friend and fellow musician, they wrote and recorded several demos, which led to a publishing contract with CBS Records in 1977. Guidry's early songwriting work included contributions to artists such as Climax Blues Band, Robbie Dupree, Exile, Johnnie Taylor, Sawyer Brown, and Reba McEntire.
In 1982, Guidry signed with Columbia and released his debut album Over the Line, which featured two hit singles: "Goin' Down" which went to number 17 on the US charts, and a duet with his sister Sandy, "Into My Love". He continued songwriting in the late 1980s but did not release another album until 2000, when Soul'd Out was released alongside a reissue of his debut. Guidry's notable songs written for other artists include "You're Good for Me" by Exile, "Gotta Have More Love" by Climax Blues Band, and "I Got This Thing for Your Love" by Johnnie Taylor. On July 28, 2003, Guidry died in a fire at the age of 49.