With more than 12,000 business members, GCP is the nation's largest metropolitan chamber of commerce. Working for a #GreaterCLE since 1848. The Economic Growth Foundation (EGF), a 501(c)(3) corporation, is a wholly owned subsidiary of the Greater Cleveland Partnership (GCP). It encourages and assists in the economic development of communities within Greater Cleveland, providing a forum in which key leaders of the community encourage, advocate. and support the development and implementation of credible and feasible plans for revitalization and redevelopment of the quality of life for residents of Greater Cleveland.