While she broke course records during individual rounds in several tournaments, Gibson's highest ranking was 27th in 1966, and her best tournament finish was a tie for second after a three-way playoff at the 1970 Len Immke Buick Open. She retired from professional golf at the end of the 1978 season. "Althea might have been a real player of consequence had she started when she was young," said Judy Rankin. "She came along during a difficult time in golf, gained the support of a lot of people, and quietly made a difference."