[Hugh R]

Looks like the gate slides in and out of the casing on the right. I'm thinking gear drive from the bottom like rack and pinion. Electric no doubt. I'm thinking that box under the small post with the white knobs or whatever is the weak point. Security screws?, not a problem. A cordless drill with bit and easy-outs and replace the screws, stuff a small remote activated switch operated by a phone app. Or better yet, if its an intelligent code type of unit, find brand name, get an appropriate remote, put in "learn" mode and program your own remote.