Need help setting up Google WiFi to my Uverse gateway

I'm considering upgrading my wireless network with a Google WiFi mesh network. I've read that with a little tinkering, Google WiFi works great. But I'm curious if having wireless set top boxes makes for a complicated set-up. Here's what I'm working with:

U-verse Fiber connection

Pace 5268BC Gateway

DVR set top box wired to the Gateway

Two wireless STBs

VAP2500 (wireless access point for the other two STBs)

I also have a Philips HUE hub and Sonos Bridge connected to my Gateway (I guess I'll need to get a ethernet switch to connect those to the main Google puck).

Can anyone advise on how to go about setting up the Google WiFi? Does the TV WAP stay connected to the Gateway, or should I connect it to the switch along with my other peripheral devices? Trying to gauge how complicated setup will be before I buy.