In an embodiment, a gate control device includes a communication interface to receive first biometric information from a first gate device at an entrance and second biometric information from a second gate device at an exit. A storage unit stores the first biometric information. A processor is configured to cause the received first biometric information to be stored in the storage unit, transmit an opening instruction to the first gate device via the communication interface once the first biometric information has been stored in the storage unit, and, when the second biometric information is received via the communication interface, compare the second biometric information to the first biometric information stored in the storage unit to determine if the received second biometric information matches the stored first biometric information, then transmit an opening instruction to the second gate device if the received second biometric information matches the stored biometric information.