In Outlook, you can use the Advanced section of the Options menu found under the File tab to export your contacts into a format that will work for Gmail. Choose to export your contacts to a file ...

First, log into your Google contacts page. Similarly, you can log into Gmail, then click Gmail in the upper-left corner above the Compose button and select Contacts.

If you have an Outlook.com email account on Microsoft's website, you can import all of your Gmail messages and contacts using the Gmail import tool. Sign in to your Outlook.com account, select ...