Gate driving unit, driving method thereof, gate driving circuit and display device

A gate driving unit, comprising a shift register and a forward-backward scanning controller, the shift register comprising a forward input sub-circuit and a backward input sub-circuit, wherein

• the forward-backward scanning controller is coupled to a first clock signal terminal, a second clock signal terminal, the forward input sub-circuit and the backward input sub-circuit, respectively, and is configured to transmit a first clock signal provided by the first clock signal terminal to the forward input sub-circuit and the backward input sub-circuit to enable the gate driving unit to perform forward scanning, and transmit a second clock signal provided by the second clock signal terminal to the forward input sub-circuit and the backward input sub-circuit to enable the gate driving unit to perform backward scanning;
• the forward input sub-circuit is coupled to a forward scanning input terminal and a pull-up node of the shift register, respectively, and is configured to transmit a signal provided by the forward-backward scanning controller to the pull-up node under control of an enabling signal provided by the forward scanning input terminal;
• and
• the backward input sub-circuit is coupled to a backward scanning input terminal and the pull-up node, respectively, and is configured to transmit the signal provided by the forward-backward scanning controller to the pull-up node under control of an enabling signal provided by the backward scanning input terminal.