Gateway device, demand response system, and program for gateway device

A gateway device (2) is provided with: a storage unit (24) in which is stored a strategy table (243) in which are recorded in advance for each prescribed priority order a plurality of request patterns, each of the patterns having associated therewith a request candidate of interest, a request adjustment power amount, and at least one type of request information including a request of interest, which is a device group, among a plurality of device groups, that is subject to a control request, and a control command to the request of interest; and a conversion process unit (231) for specifying the request pattern in the strategy table (243) having the highest priority ranking among request patterns matching the request adjustment power amount and request candidate of interest specified in a demand response request, and generating a control request including request information for each type of request information extracted from the specified request pattern.