Wire size?

How many amps does your gate motor require? FWIW, some automatic gates are powered by a battery.

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.

Others mentioned you need to list the current of the load.

One other thing is that 200 feet may be too long.

Numbers vary from 150 to 250 feet is the maximum length of wire from the outlet to the load of a ground fault outlet. They may trip from the internal leakage of the wires if long enough.

I use the term internal leakage very loosley as there can be several factors determining the tripping due to wire length.

Good point. IDK what the code says regarding electric gates and GFCI. But he may be better off running it non-GFCI to the gate and then installing a GFCI there, just before the gate. Having a GFCI receptacle at the gate might be a good idea too, handy for future repairs, plugging in a chain saw, Xmas lights, etc.

That's pretty much what I ended up doing here, on my project to run power to a storage shed in the back yard. The run was 120 feet so the electrician put in a standard breaker at the service panel at the house, then a pair of GFCI breakers inside the shed, one for lighting and one for receptacles. His reasoning was that I won't lose the lights if I trip the receptacle breaker. Handy for working after sunset.

Maybe it's too late but there's an alternative here:

One issue might be burial depth. A 120v 15 or 20 amp GFCI protected circuit on residential property only needs to be 12" down. Otherwise it is 18" for pipe and 24" for direct burial cable. The max length on a GFCI circuit is also manufacturers erring on the safe side. I don't even have a clue how much wire is on the circuit in my screen cage and out to the shed but it is way over 250 feet total.

Or just 2" if the conduit is through rock (with not less than 2" of concrete) and 24" if the conduit goes under a street or road off of the property (as per code NEC table 300.5, figure 300-7).

vehicle's weight is not what opens gates ( At least out of a few thousand I have put in ) Simply put its a metal detector where you see the square or circle in the the street/drive.

Did you watch the video before you replied?! *The weight of the vehicle causes the gate to open!* Here's the link again:

Watch and learn.