-> [name of calender]
In private address, click on the ICAL icon . A small dialog will pop up, copy the URL given.... Paste the above URL in Download from area.
Check on "On Startup" in Automatic Reload
Check on "On every change in Automatic Save
Click Ok, and you are done set... ings --> Import Calendar.
The rest should be pretty easy....
Just use GCALDeamon: [[http://gcaldaemon.sourceforge.net/]]