If Traveline South West could sort their data out (ie the BLUE Park and Ride in Exeter does not stop on the way into the city, TSW claim it does - has been a known problem for about 10 months now!) then google might be able to use it. As it is the SW data is very unreliable...
A similar issue exists for the Bath Road Park and Ride site in Bristol. Requesting information on a journey from Temple Meads to a company opposite would show in Traveline as suggesting you take the Park and Ride service 904 from outside the station to the Park and Ride site.
Unfortunately, you can only purchase tickets for the Park and Ride from the site itself; it is not permitted to make single journeys from the Centre to the Park and Ride (unless you bought a multijourney ticket in advance).
The first time I wanted to do this journey Traveline told me to catch this service, but the driver said it was not permitted. I note now, over 6 years since I first made that journey, it still tells you to board the Park and Ride.