Free PHP Scripts by Gscripts.net

This free Joomla add-on offers a component which shows Google calendars inside you joomla made site. A Joomla module which displays the latest updated events as well as a module which shows the upcoming events is also provided. A module which embeds the google calendar is available since release 1.4.1.

The only thing you have to set is the HTML url and the XML url of your Google calendar.