He teaches at the Art Students League of New York throughout the year and at various workshops around the world. His first book, PROBLEM SOLVING FOR OIL PAINTERS, is now in it's 29th year of publication, and his new book, OIL PAINTING ESSENTIALS, has just hit stores this year. He is represented by the following galleries: Cooper & Smith in Essex, Connecticut, Gallery Shoal Creek in Austin, Texas and The Garver Gallery in Madison, Wisconsin. Gregg is also a playwright; he has published three full-length plays with Samuel French.