Gil has practiced Zen and Vipassana since 1975 and has a Ph.D. in Buddhist Studies from Stanford. He has trained in both the Japanese Soto Zen tradition and the Insight Meditation lineage of Theravada Buddhism of Southeast Asia. Gil was trained as a Vipassana teacher by Jack Kornfield and is part of the Vipassana teachers\' collective at Spirit Rock Meditation Center. He was ordained as a Soto Zen priest at the San Francisco Zen Center in 1982, and in 1995 he received Dharma Transmission from Mel Weitsman, the abbot of the Berkeley Zen Center. He has been the primary teacher for the Insight Meditation Center in Redwood City, California since 1990.