After January 30, 2013, Google stopped support for new EAS (Exchange ActiveSync) connections in some scenarios. EAS is a technology that helps you sync your email, calendar, and contacts across multiple devices (like your desktop, laptop, and tablet). So, is there a way to still sync google calendars / contacts to Windows 8 or other devices?
Luckily, we can still sync your calendars or contacts through Windows Live Account. This can be used to make Google calendars and contacts available to Windows 8.
What we need to do is to use your existing Windows Live Account (or create a new one with your Google Gmail account) to connect Google Account. Then we could use the Windows Live Account to populate all the calendars and contacts.
Here are the detail steps:
Step 1: Log in to your Google account and follow over to the Calendar tab. On the left pane hit the drop down arrow against the calendar you wish to share and navigate to Calendar Settings.
Step 3: Log in to your Hotmail/Live account and head over to its Calendar feature.
Step 4: From among the feature tabs take the option to Subscribe for another calendar.
Step 5: Paste in the Calendar URL you had copied in Step 2. It should still be in your clipboard if you haven’t diverted from this article. Also give it a name and choose a color theme and/or select a Charm.
Step 6: (Optional) Your Google calendar is now in sync with your Hotmail/Live calendar. You can find it on the left pane of Calendar home. The step is optional just in case you may want to verify the addition of your calendar.
Step 7: Open WLM on your desktop and either wait for an auto update session or refresh things immediately. Under Send/Receive take the option saying All Calendars. Make sure you are connected to your Hotmail/Live account.
Step 8: You calendar now shows up in WLM. Find you calendar among others on the left pane. The image below shows Google calendar event under 23rd (color-differentiated).
Since Google dropped the support the EAS, there is no direct way to sync directly with Windows 8 at this moment. I wish that it would come with a subscribe option and hope to see one in future. Till then this is the best I could come up with.
Note: Part of this article is taken from http://www.guidingtech.com/10373/show-google-calendar-in-windows-live-mail-calendar/.