A gate driving circuit including M shift registers, a detecting unit, a control unit, a repair starting unit, a signal repairing device, and a signal replacing unit is provided, wherein M is a positive integer. The shift registers sequentially shift a starting signal according to a plurality of clock signals to generate M gate driving signals. The detecting unit detects the gate driving signals. The control unit generates a first and a second auxiliary signals, wherein the first and the second auxiliary signals are synchronous with two gate driving signals which are before and after a specific driving signal. The signal repairing device is enabled according to a valid repair starting signal outputted by the repair starting unit to generate a repairing signal according to the first auxiliary signal. The signal replacing unit replaces the specific driving signal with the repairing signal according to the clock signals.