General Info: Grand Prairie Coop, also known as GPCI, is a provider of agricultural production services. The GPCI facilities, where grain initially enters the marketing channels, is maintained by full-time millwright crews. Handling and drying equipment is upgraded or repaired as need arises. The network of railroads and interstate highways serving the company s trade territory indicate the shipping capabilities of GPCI. The effort of the early settlers of the Grand Prairie, to grow and market their crop, has been instrumental in making GPCI an important force in serving the world food economy with solid resources and modern facilities. Headquartered in Tolono, Ill., Grand Prairie Coop is a privately owned company that employs nearly 100 people.