GCS (Aust) Inc. is a non-profit organisation established by the chiropractic profession, for the chiropractic profession.

The GCS (Aust) Inc. was founded in 1990 to promote the Gonstead System of Chiropractic in Australia through undergraduate and postgraduate educational courses and seminars, newsletters and journals, and research.

Since 1990, GCS (Aust) Inc. has conducted seminars, many involving staff from the Gonstead Clinic in Mt Horeb, WI, USA and others involving Australian Fellows of GCS (Aust).

Undergraduate courses have been established at the Centre for Chiropractic, Macquarie University and the Chiropractic Unit, Department of Chiropractic, Osteopathy and Complimentary Medicine, RMIT University.

The GCS (Aust) Inc. conducts training and examination for Diplomate Status for Chiropractors who have at least five years postgraduate experience and who have completed at least 130 hours of postgraduate training in the Gonstead System of Chiropractic. Since 1990, eight Fellows & over twenty four Diplomates have been graduated.