GTT is a program for experiencing and studying Holotropic Breathwork™ and the transpersonal perspective. It is a two-track program that can be used either to become a certified practitioner or simply to experience this practice in a more in-depth format. It is the best way to spend time with HB co-developer and one of the founders of transpersonal psychology, Stanislav Grof. Although semi-retired, Stan still teaches at some of the six-day training workshops, also called modules.