An automatic ticket examination system that enables tapless passage or an entry/exit system is achieved without a malfunction. There is provided a gate apparatus including a positioning unit that measures positions of a plurality of wireless communication terminals, and an authentication unit that performs authentication for determining whether or not each of the wireless communication terminals is permitted to pass through a gate on the basis of each of the positions of each of the wireless communication terminals which have been measured by the positioning unit. With this configuration, the automatic ticket examination system that enables tapless passage or the entry/exit system can be achieved without a malfunction.