Simply go into Settings > Sync > Google Calendar and do a Reset Sync. I chose Erase Local Data since I had nothing that wasn’t already on the GCal side and it synced up like a charm! No more errors.

A side note–I am loving the shake to sync feature! It’s a cute and quick way to update the calendar. Because it is so handy I turned off Sync at startup on both GCal and Toodledo…that way I can get to my calendars that much faster. Every second counts, after all!