is the private iCal address. Go to Settings in your Google Calendar account, click Calendars, and click on the calendar you want to subscribe to in Outlook. Scroll down and, under Private Address, click ICAL. Then click the URL, and you'll be prompted to choose an application to open it with. Open it with Outlook and you will be presented with a split-screen view of your default calendar and the newly subscribed calendar.
i'd like to draw on the vast knowledge base out there to see if anyone knows of a way to sync gcal and outlook.
For all of google's ingenuity and interesting ideas i thought that they would have a very simple solution.