Miller was a regular exhibitor and recipient of awards in national watercolor exhibits since the early 1950’s: Certificate of Merit from the Whitney and Museum of Modern Art, New York (1962).. He was a member of the prestigious American Watercolor Society, Audubon Society (since 1949), the Wisconsin Watercolor Society, and Wisconsin Painters and Sculptors.

In 1975, along with his wife, Ruth, he founded the Miller Art Center in Sturgeon Bay, Wisconsin, (now the Miller Art Museum) where over 100 of his works are housed and exhibited on a rotating basis. Ruth Miller published a loving biography of Miller in 1987 and they co-authored two more: The Other Side of the Door and The Thrill of Castle Hunting. In the last several years of his life, Gerhard published several small paperbacks: Spiritual Guide to the Scientific 21st Century, Levels-Physical, Mental and Spiritual, Philosophical Truisms, Highlights of the Holy Land, God is in Control, and Highlights of the Travels of an Artist and His Wife.

Info from www..millerartmuseum.org/collection.htm