Gatlin was born in Seminole in Gaines County, Texas, next to the New Mexico border. His father was an oilfield worker, and the family lived in several locations while he was a youth, including Abilene and Odessa. He was reared listening to country and southern gospel music. He and his brothers, Steve and Rudy, have performed together since childhood; when they were younger, they often sang in their local church. They sometimes performed on local radio stations, and occasionally on television shows. They also recorded a gospel music album for the Gospel label Sword and Shield. The brothers even managed to beat out the legendary Roy Orbison in a local talent contest. In 1964, Gatlin was a quarterback at Odessa High School.  After graduation in 1966, Gatlin was eligible to serve in the Vietnam War; however, he did not, instead choosing to attend the University of Houston. As a wide receiver on the football team, he caught a touchdown pass in a 1968 game in which his team, the Cougars, scored 100 points.  He later auditioned for and joined the gospel music group The Imperials. The Imperials went on to perform in Las Vegas, Nevada in January 1971 at Jimmy Dean's Las Vegas Revue. While walking through the showroom, he caught country singer Dottie West's attention, who thought he looked like Mickey Newbury.  West soon met Gatlin and was impressed with his songwriting skills. She was so impressed, in fact, that she recorded two of Gatlin's compositions, "You're the Other Half of Me" and "Once You Were Mine." West also passed one of Gatlin's demo tapes around Nashville, Tennessee, and even arranged for him to relocate there, purchasing a plane ticket for him--a story he related on the 11/12/2009 episode of "Larry's Country Diner" on RFD-TV. West later recorded other compositions by Gatlin that would later become hits for him, including "Broken Lady", which was put on West's 1978 album, Dottie.

Answer this question "Why didn't he?" by extracting the answer from the text above.
instead choosing to attend the University of Houston.