Steps to import calendar in Outlook 2010

Step 1: Open Outlook in your computer.
Step 2: Go to File and select and click Import option.
Step 3: In the Import and Export Wizard, choose Import Calendar or vCalendar file, and then choose Next.
Step 4: Select the file that you wish to import to Outlook.
Step 5: Finally Click the option Import.
Step 6: Go to your calendar, you should now see your Google Calendar events there.