In this article you can find out how GCalendar covers the two streams Joomla 1.0.x and 1.5.x.
Since GCalendar release 1.4.1 there exists two branches. On the joomla 1.0.x branch there are GCalendar 1.4.x releases which are running on joomla 1.0.x. On the joomla 1.5.x branch, which is actually the MAIN trunk, there are GCalendar 1.5.x releases which are running on joomla 1.5.x natively.
Releases on the joomla 1.0.x branch are not compatible for joomla 1.5.x and vice versa. Please check also the roadmap to see for further releases and the forum announcements and development status.
