How can I integrate this device to my home automation system?

Yes, you can connect GDB remote device either to the back of the wall button or the terminals on the opener.

There is a small hole at the bottom of the monitor, use a pen or paper clip to hold the button inside the hole. When you hear 4 beeps, release

Logout of the Monitor app. Then click ‘Forgot password’ to reset password. Here’s how to log out of the monitor app. For iPhone, click the “About” tab in the monitor