Gummer's commissioned works have included Primary Compass (2000), a site-specific outdoor permanent sculpture at the Butler Institute of American Art, Youngstown, Ohio and a sculpture/fountain in Historic New Harmony, New Harmony, Indiana. One stainless steel and stained glass sculpture, Southern Circle, standing 25 feet (7.6 m) tall and weighing approximately 20,000 pounds, was commissioned by the city of Indianapolis and dedicated in October, 2004. "Primary Separation", a permanent installation at the Massachusetts Museum of Contemporary Art, was completed in 2006.