He used to teach this course in a weekend for around $700. When he could no longer fill the courses, he published a book on it. At almost the same time, a player in South America came up with an almost indentical system that he posted on a few sites.
Its a weak system. Any serious player should learn any of the much stronger ones. KO Rookie or KISS are examples of systems almost as simple , that give better results and are expandable. GT is a dead end.