Go to Your Google Calendar
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Go https://www.google.com/calendar, login and and click "Settings" in the top-right corner.
Find the Calendar ID
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Click on "Calendars" and then click on the name of your calendar. Scroll down to "Calendar Address" and copy the "Calendar ID" to your notepad. It will have a long string of characters and then @group.calendar.google.com
Make the Calendar Public
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Click "Share This Calendar", check the box next to "Make this calendar public" and click "Save".
Download the GCalendar Component
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Now that you have your Google Calendar set up correctly, we're going to install the necessary Joomla component. Visit http://g4j.laoneo.net to download the GCalendar component
Extract the GCalendar Folder
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Click on the GCalendar folder and extract it so you can see the various extensions inside.
Install GCalendar
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Go to Extensions >> Install/Uninstall and click "Browse" to upload com_gcalendar
Go to the GCalendar Component
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Go to Components >> GCalendar >> GCalendars
Creating a New Calendar
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Click "New" in the top-right corner. You'll see three fields. You only need to give the calendar a title and enter the "Calendar ID" you found and saved earlier. Click "Save"
Make a Menu Link to the Calendar
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Go to Menus >> Main Menu >> click "New" >> choose "GCalendar"
Choose the Calendar
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Choose the calendar you created and click "Save".
Your Calendar Should Be Ready ...
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