The Great Cloud Zen Society (GCZS) is an umbrella organization of Zen Buddhist centers and affiliate groups that provides facilities, structure, and training for Zen practitioners, both lay and ordained. The leadership for GCZS is provided by Myo Gak Kun Sunim of the Great Cloud Zen Center in Cincinnati, Ohio. Affiliate groups meet for regular meditation and offer occasional one-day and multi-day intensives. Group leaders are trained to offer beginning instruction in Zen meditation, and manage the training and spiritual programs of their groups.