Edit: it is working if i use the friendly name “Home” rather than “zone.home” in the template sensor.
sensor:
- platform: google_travel_time
name: test
api_key: !secret google_api
origin: device_tracker.ryaniphone
destination: sensor.my_destination
Then a template sensor.
my_destination:
value_template: '{%-if is_state("device_tracker.ryaniphone","work")-%}Home{%- else -%}Work{%- endif %}'
friendly_name: 'My Destination'
this idea was borrowed from