Gilbert Chamber of Commerce. Mission Since 1978, the Gilbert Chamber of Commerce proactively serves as the business advocate to strengthen the business climate in Gilbert. Representation The Gilbert Chamber of Commerce is a not-for-profit, membership-based organization with more than 620 members ranging from home-based businesses to large corporations and representing more than 50,000 employees. The Chamber is governed by a board of directors. Members of the board are representative of the various segments of our membership to ensure new ideas and expertise as we plan for programs and services on behalf of the business community.