This hasn’t been implemented as of now. I’ve passed along that this is something multiple people are interested in.
Unfortunately, after some more investigation into the manual route, I don’t believe you can actually connect to the api through our HTTP functions, either. If you look at the link below, you’ll see that Google Calendar only allows you to authorize using OAuth 2.0, which I don’t believe is possible for us to handle through just raw HTTP functions. If we had an HTTP Request action specifically for the Google Calendar connector, then we could use that because that would handle the authorization part.
Again, I’m passing along the feedback. Definitely seems like good functionality to have.