A guide system for guiding at least one movably-supported door wing (3a, 3b, 4a, 4b), comprising: - at least one guide rail for guiding the at least one door wing (3a, 3b, 4a, 4b), the at least one guide rail having a longitudinal direction, - at least one running carriage configured to be connected to the at least one door wing (3a, 3b, 4a, 4b) and being configured to be displaceably supported along the at least one guide rail, - a carrier on which the at least one running carriage can be arranged, the carrier being movably supported in a direction extending transversely to the longitudinal direction of the at least one guide rail, wherein the carrier, in a mounted position, is movable into a transfer position in which the carrier adjoins the at least one guide rail in the longitudinal direction, so that the running carriage can be transferred to and from between the at least one guide rail and the carrier, - a locking device for releasably locking the carrier in the transfer position, so that a movement of the carrier in the direction extending transversely to the longitudinal direction can be prevented or restrained, wherein the locking device includes at least one movably-supported locking element for releasably locking between the at least one guide rail and the carrier, - at least one control contour configured to be curved at least over a region, so that the running carriage, upon a transfer from the at least one guide rail to the carrier, is movable at least over a region in the direction extending transversely to the longitudinal direction, - wherein the at least one movably-supported locking element includes at least one supporting element configured to be displaceable along the at least one control contour, characterized in that the at least one control contour is formed or arranged on an end section of the first guide rail, wherein the control contour, collectively with the first guide rail, has an integral one-piece configuration, or wherein the control contour is arranged on an adaptor portion separate from the first guide rail, wherein the at least one locking element is linearly displaceably supported. - at least one guide rail for guiding the at least one door wing (3a, 3b, 4a, 4b), the at least one guide rail having a longitudinal direction, - at least one running carriage configured to be connected to the at least one door wing (3a, 3b, 4a, 4b) and being configured to be displaceably supported along the at least one guide rail, - a carrier on which the at least one running carriage can be arranged, the carrier being movably supported in a direction extending transversely to the longitudinal direction of the at least one guide rail, wherein the carrier, in a mounted position, is movable into a transfer position in which the carrier adjoins the at least one guide rail in the longitudinal direction, so that the running carriage can be transferred to and from between the at least one guide rail and the carrier, - a locking device for releasably locking the carrier in the transfer position, so that a movement of the carrier in the direction extending transversely to the longitudinal direction can be prevented or restrained, wherein the locking device includes at least one movably-supported locking element for releasably locking between the at least one guide rail and the carrier, - at least one control contour configured to be curved at least over a region, so that the running carriage, upon a transfer from the at least one guide rail to the carrier, is movable at least over a region in the direction extending transversely to the longitudinal direction, - wherein the at least one movably-supported locking element includes at least one supporting element configured to be displaceable along the at least one control contour,