Home - Greater Peoria Contractors & Suppliers Association, Inc. | Peoria, IL GPCSA Upcoming Community Events Proudly Serving The Greater Peoria Community Proudly Serving The Greater Peoria Community Proudly Serving The Greater Peoria Community About GPCSA Greater Peoria Contractors and Suppliers Association GPCSA is an organization of qualified construction contractors and industryrelated companies dedicated to skill integrity and responsibility. The fundamental goal of the Association is to address the needs goals and concerns of its members thereby improving the quality of the local construction industry. The Association provides a full range of programs and services including but not limited to networking opportunities labor relations and collective bargaining educational and professional development plan room accessibilitylead generations legislative and political awareness as well as community connections meeting space and print scanning. Member Directory Upcoming Events Tip of the Week Member Spotlight G.