A gate driver for controlling a display apparatus is provided. The gate driver includes a logic circuit, a plurality of buffers, and a charge sharing module. The logic circuit generates a plurality of switch signals. The buffers are coupled to the logic circuit. Each of the buffers determines to provide a first voltage or a second voltage according to one of the switch signals to generate a gate driving signal. The charge sharing module is coupled to the output ends of the buffers and allows the output ends of the buffers to share charges according to a plurality of sharing signals during a forward edge and a backward edge of a square wave of each of the gate driving signals. Furthermore, a gate driving method for controlling a display apparatus is also provided.