A gate driving unit includes an input module, a first output module, a second output module, a feedback module, and an output-controlling module. The input module outputs a previous level-transferring signal into a first node. The first output module outputs a present level-transferring signal. The second output module outputs a scan signal. The feedback module outputs a present-level feedback signal. The output-controlling module pulls up potential of the scan signal to a first direct-current high voltage and pulls up potential of the present level-transferring signal to a second direct-current high voltage.