Enable Google Home from the settings page on your Thinka. Doing so you allow the Thinka to setup a connection to Google via the secured Thinka cloud.
Next check to see that your Thinka is connected to the Thinka Cloud:
Now click the “PAIR” button and copy the generated token.
On your smart phone, start the Google Home App, Create a Home, and Click on add. Next choose "Set up device" and Choose "Works with Google". Find "Thinka for KNX" in the list of devices and select it. Next you will use the generated token to pair with Google Home: