Open up your Outlook calendar, click the Home tab on the Ribbon, and under Manage Calendars click on Open Calendar \ From Internet…

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Now enter the link location into the New Internet Calendar field then click OK.

FOR EXAMPLE: Main Horley Calendar
https://www.google.com/calendar/ical/webmaster%40horleycc.co.uk/public/basic.ics

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Click Yes to the dialog box that comes up verifying you want to subscribe to it.

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If you want more subscription options click on the Advanced button. Here you can name the folder, type in a description, and choose if you want to download attachments.

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That is all there is to it! Now you will be able to view your Google Calendar in Outlook 2010.