Hi @rbaus,
The easiest solution that I can see is to have a double gate. You already have a post in place, you would just need to cut back the rails, remove the central post and then hang a gate on the post to the left that meets the existing one in the middle, then install hardware.
You would start by cutting out the rails, then removing the fence post. You could cut the rails flush with the post on the left using a reciprocating saw or a handsaw, then unscrew them and the mesh from the post on the right. Assuming the fence post is concreted in, you can then use a fencing bar to dig out and expose the concrete. It will take a bit of work, but once it is free, you can lift it out of the hole. If the concrete is too heavy to lift as one, you can use a rotary hammer drill or a jackhammer to break it up.
Once the post and rails have been removed, you can then construct a second gate using a suitably sized gate frame for the opening. You would then just attach some palings to the gate frame, attach the frame to the post using the hinges that are provided and then attach a drop bolt to one of the gates, and a gate latch to hold them together.
Let me know what you think, and if you have further questions, please don't hesitate to ask.
Jacob
