It would be nice if in the repository, I could specify the msu.edu Google Apps domain and automatically send people to log-in to our specific domain. Another request for this has been made at http://moodle.org/mod/forum/discuss.php?d=182435. Perhaps there could be a Google Apps and Google repositories where the Google Apps ones lets you specify your Google Apps domain.
In the meantime, I tried adding /a/msu.edu/ to various URLs in /lib/googleapi.php to force the repository to go to our Google Apps site, but I couldn't get it to work. If there is a custom workaround to do this, I'd be satisfied with that in the meantime.
I was able to take the URL of the Google repo login screen of:
https://accounts.google.com/ServiceLogin?btmpl=authsub&continue=https%3A%2F%2Faccounts.google.com%2FAuthSubRequest%3Fnext and etc.
and it sort of worked.