Those hinges show 2 ways I've achieved that. The first style is only for small amounts of rise, and uses the ramp to encourage closing. But mainly it just allows the door to be closer to the ground when closed, and only works well when clean. More for a door than gate, certainly not a big gate. The one I did that on was a man gate, was much heavier than that, and only the bottom had the ramp.

The second is what I was talking about. But you have to offset the axis, not just the pins. Both pens remain on the single axis of rotation. The gate is a relatively rigid rectangle, so if you have the hinge axis kicked N degrees as shown, then when the gate is in line with the axis kick out, the bottom of the gate will have N angle to the ground.

But you may need to put a control system of some sort on the gate. I did one like that at my old house for a pretty heavy steel man gate, and it shut like the gates of hell if released from about 45*, but could be easily parked with minimal restraint at ~90*