The development of GCalendar is slowed down in the last couple of month because we put all energy into DPCalendar. We have now a free version of DPCalendar and a migration path for GCalendar users. You can read the full announcement here. This site will be closed soon and the forum/ticket system and download area will be taken offline.
Don't be worried GCalendar is not dead, it has just evolved into DPCalendar FREE with much more features than it was ever possible to do with GCalendar.