Driveway motion sensor, mains powered, speaker in house

All seem to be solar, battery powered. I'd love to have a RAB stealth360 connected to some speaker system in the house.

I'm lucky in that i have 120v at the gate. Don't want to futz around with solar or batteries.

I'm pretty handy and electronically inclined.

What are my options? Setting up any sensor is fairly easy, it's getting the signal inside the house that is the part I'm not clear on.

Does anyone have any tips on doing something like this?