Attach the two gate hinges to the side of the gate frame with the loops facing out.
Keep the straps loose enough so that you can slide the hinges up and down on the gate frame, since you will need to adjust them once the gate is in position.
Place blocks on the ground at the where you will install the gate. These will support the gate while you are connecting the hinges.
Lift the gate panel into position so that the gate lines up with the fence and at the desired height. Adjust the blocks as necessary to achieve the desired height.
Adjust the hinges so that the gate can swing freely.
If the gate is too wide to close properly, adjust the angle of the hinges so that they are almost perpendicular, which brings the gate edge closer to the fence post.