I made a minor bugfix last week that was intended to help with importing Google Calendar iCalendar files. My understanding is that Google can export to iCalendar. I don't use Google Calendar though so I couldn't specifically test it. If you would like to be a guinea pig that would be great. Just use the "Import Ical" feature. If you suspect anything may not have worked, check "View Log" and report any error-type messages after the last "Started" message.

If anyone is interested in doing other testing on calend, you can backup the state of your calendar by first closing the calend app (not just minimizing it) and then doing something like this from an xterm:
cd /home/user/MyDocs/.python
cp calend_data.dat calend_data.dat.bak

Then if you want to use your previous data file close the calend app again and run (from the same directory as above):
cp calend_data.dat.bak calend_data.dat