It uses a compassionate spiritual approach that simplifies theory in the actual therapy and hones in on allowing the inner mind to construct its own solutions creatively. The approach is generally considered to be rapidly effective[3]. Boyne continued to train hypnotherapists for over 55 years, continuing to evolve many novel techniques in the field and imparting them to his students. Boyne founded Westwood Publishing, one of the first publishers to focus on hypnotherapy-focused publications. Boyne also founded the American Council of Hypnotist Examiners in 1980. From his Glendale offices near Hollywood, Gil worked with many actors throughout his career, including Sylvester Stallone, Lily Tomlin, and Dolly Parton. Such work often brought international media attention. He was also a technical director or advisor on several films and television series, including "The Hypnotic Eye", "Above and Beyond", and "The Eleventh Hour". In addition, Boyne reportedly worked with professional and olympic athletes and the US Green Berets.