Displaying Google Calendar event data on FullCalendar

Question

I am using Google Calendar as a storage engine for a calendar system I am building, however, I am using a single Google user account with multiple calendars, i.e. each user on my system has their own calendar within the one user account.

I'm able to create a calendar per user just fine, but I would like to have FullCalendar retrieve the events for display purposes, without manually getting the magic cookie url from Google Calendar settings. I would like to be able to retrieve it programmatically or 'proxy' the feed via an authenticated call to get event data that I'm doing in Django.

$('#calendar').fullCalendar({
    events: $.fullCalendar.gcalFeed(
        "http://www.google.com/calendar_url/"  <-- or  /my/event/feed/url
    )
});