In this video

Carefully place the completed gate frame into the opening between the newly installed posts. Use wood shims or small blocks of wood to elevate the gate slightly off the ground, creating a consistent gap that allows it to swing freely without dragging and to ensure it is level. Mark the precise locations for the hinges on both the gate frame and the fence post. Attach T-hinges (or heavy-duty strap hinges) to the gate frame and the gate post using a cordless drill and appropriate exterior-grade screws. Ensure the hinges are evenly spaced and securely fastened, allowing the gate to pivot smoothly. Next, install a gate latch mechanism. Attach the main latch component to the gate frame and its corresponding receiver (strike plate) to the gate post. You may need to use a chisel and hammer to create a shallow mortise (recess) in the post or frame to allow the latch to engage smoothly and securely. Finally, test the gate's swing and latch mechanism to ensure smooth operation and proper closure.