Display panel, gamma debugging method thereof and display device

The invention discloses a display panel and a gamma debugging method thereof, and a display device, and the display panel comprises a gate drive circuit, a first gating module, and a plurality of rows of sub-pixels. Each sub-pixel comprises a pixel circuit and a light-emitting element, the pixel circuit comprises a driving transistor, a first transistor and a second transistor, the first transistor and the second transistor are electrically connected with a grid electrode of the driving transistor, and a first gating module is additionally arranged between the output end of the grid electrode driving circuit and the grid electrode of the second transistor of the sub-pixel in the (i + 1) th row. Whether forward electric stress is provided for the grid electrode of the second transistor of the sub-pixel in the (i + 1) th row or not can be determined, so that the electric leakage of the electric leakage paths in the odd-numbered rows and the even-numbered rows is adjusted, the grid electrode G point voltage of t