The Plus service allows you to use the Google+ API in Apps Script. This API allows Google+ users programmatic access to their circles, posts, and comments.
Reference
For detailed information on this service, see the reference documentation for the Google+ API. Like all advanced services in Apps Script, the Plus service uses the same objects, methods, and parameters as the public API.
To report issues and find other support, see the Google+ support guide.
Sample code
The sample code below uses version 1 of the API.
Get a list of people in the user's circles
This sample logs all of the people in the user's Google+ circles. Notice the use of page tokens to access the full list of results.
Get a list of the user's posts
This sample logs the titles of 10 posts the user has posted on their stream. For each post, it also logs the first 20 comments, if they exist.