battery powered keypad to operate relay to open gate???

I have a problem. My access gate into my house has an electric gate latch release operated by a release switch just inside the gate so you have to use a key to get in from the outside. Im looking to put a keypad outside the gate so i can use a code to open it so guests can enter without a key. There is a gate release button inside the house which is only 10m away from the gate. Is there a battery powered wifi keypad that i could put outside the gate to operate a wifi enabled relay inside the house wired to the button that could open the gate???

If that isn't available is there a wired keypad solution i could wire to the release switch inside the gate?

thanks