Gus Schumacher Food Insecurity Nutrition Incentive Reauthorization Act of 2018 This bill reauthorizes and modifies the Department of Agriculture (USDA) Food Insecurity Nutrition Incentive grant program. The program supports projects to increase the purchase of fruits and vegetables among low-income consumers participating in the Supplemental Nutrition Assistance Program (SNAP, formerly known as the food stamp program) by providing incentives at the point of purchase. The bill renames the program the Gus Schumacher Food Insecurity Nutrition Incentive program and modifies requirements regarding the nonfederal share, application criteria, and the priorities for awarding grants. The bill also requires USDA to establish a Food Insecurity Nutrition Incentive Program Training, Evaluation, and Information Center to assist grant recipients.