On Mon, 4 Jan 2021 05:35:00 +0000, steve
wrote:

I put an automatic gate in but I did not know that I was going to when I built the house. I have a GFI outlet on the back of my house about 200 feet from where I need power. What size wire should I use. Its 110v

Most gates I have seen only use the AC power to charge the battery.
The requirement is pretty low.
Even if this is direct AC drive, #12 should be plenty.