The story
Founded by Juliu Horvath.1
The Gyrokinesis and Gyrotonic methods of exercise were developed by Juliu Horvath.
In New York City in the early 1980s, Horvath started sharing his exercise technique at Steps dance studio on Broadway, and in Central Park. First calling it the Julio Horvath Method, he later chose a combination of the Greek words for "circling" (Gyro) and "stretch" (Tonic).
From Wikipedia’s article on Gyrotonic, shared under CC BY-SA 4.0.4