Google Calendar Sync on Linux

To display multiple calendars in Evolution (view only)

• Create a new Web calendar (right click on calendar)
  
• Copy the ICAL address from google
• change http:// to webcal://
• Change Refresh interval to something reasonable (otherwise for big calendars Evolution will spend ages getting calendar)
  

To do 2 way sync

http://gcaldaemon.sourceforge.net/usage16.html#offline

First sync got an error:

FATAL | Connection refused!
com.google.gdata.client.GoogleService$CaptchaRequiredException: Captcha required
at com.google.gdata.client.GoogleAuthTokenFactory.getAuthException(Unknown Source)

...so needed to unlock a Captcha - https://www.google.com/accounts/DisplayUnlockCaptcha