A gate latch device to secure a gate in a closed or latched position to a fence or other barrier to close or block a portal formed therein comprising a latch assembly including a lower latch pin and a keeper safety catch mounted to the fence or other barrier adjacent the portal and a keeper assembly including a magnet disposed adjacent a latch pin recess mounted to the gate such that when the gate is closed the magnet attracts the lower latch pin from a normally biased upper or unlatched position to a lower or latched position drawing the lower latch pin downward into the latch pin recess against the force of the bias to prevent the gate from opening and wherein the keeper safety catch selectively engages the keeper assembly to limit the outward movement of the keeper assembly relative to the latch assembly to retain the lower latch pin from becoming dislodged from the latch pin recess to maintain the gate in the latched position.