A gate system arranged between a first region and a second region, comprising a first gate system and a second gate system, each including: a guide that defines a movement path of a user from the first region to the second region; an imaging device that photographs the user to acquire an image used for biometric authentication; and an opening/closing member provided in the movement path so as to be opened or closed in accordance with a result of the biometric authentication, wherein, in each of the first gate system and the second gate system, the movement path includes a first portion in which the user is photographed, a second portion through which the user passes after being photographed, and a third portion through which the user passes after being photographed, the first portion extends from the first region toward the imaging device in a first direction that is parallel to an optical axis of the imaging device, and the second portion extends from an end of the first portion in a second direction that is not parallel to the first direction, and the third portion extends from the end of the first portion in a third direction that is not parallel to the first direction, wherein an end of the third portion of the first gate system is connected to a beginning of the first portion of the second gate system, and wherein when the user is determined to be a registrant in the biometric authentication based on the image acquired by the imaging device, the user is guided by the guide to the second portion of the first gate system, and when the user is not determined to be the registrant in the biometric authentication, the user is guided by the guide from the first portion of first gate system to the third portion of the first gate system. a guide that defines a movement path of a user from the first region to the second region; an imaging device that photographs the user to acquire an image used for biometric authentication; and an opening/closing member provided in the movement path so as to be opened or closed in accordance with a result of the biometric authentication, wherein, in each of the first gate system and the second gate system, the movement path includes a first portion in which the user is photographed, a second portion through which the user passes after being photographed, and a third portion through which the user passes after being photographed, the first portion extends from the first region toward the imaging device in a first direction that is parallel to an optical axis of the imaging device, and the second portion extends from an end of the first portion in a second direction that is not parallel to the first direction, and the third portion extends from the end of the first portion in a third direction that is not parallel to the first direction, the movement path includes a first portion in which the user is photographed, a second portion through which the user passes after being photographed, and a third portion through which the user passes after being photographed, the first portion extends from the first region toward the imaging device in a first direction that is parallel to an optical axis of the imaging device, and the second portion extends from an end of the first portion in a second direction that is not parallel to the first direction, and the third portion extends from the end of the first portion in a third direction that is not parallel to the first direction, wherein an end of the third portion of the first gate system is connected to a beginning of the first portion of the second gate system, and wherein when the user is determined to be a registrant in the biometric authentication based on the image acquired by the imaging device, the user is guided by the guide to the second portion of the first gate system, and when the user is not determined to be the registrant in the biometric authentication, the user is guided by the guide from the first portion of first gate system to the third portion of the first gate system.