GCG Associates, Inc. is a multi-disciplined civil engineering firm with our main office in Wilmington, Massachusetts. In 1986, GCG Associates, Inc. was established as an independent engineering firm to provide planning, design, and construction services for civil, structural, sanitary, and environmental engineering projects for public and private clients. The firm has successfully completed projects including impact studies, feasibility studies, detailed design plans, and construction management for the whole spectrum of civil works. GCG Associates offers the in-house capability to provide the required personnel and support resources necessary to assist clients in all types of projects to meet their individual needs.