Microsoft has announced a new service/import tool that will allow users to switch from Gmail to its Outlook.com mail service. So if you are considering to move from gmail to outlook mail service, you can do it easily with the new Outlook.com import tool.
The import tool will retains all your existing Gmail mails and labels and will sort them into corresponding folders on Outlook.com. It allows you to set up an Outlook.com account and then connect it to your existing Gmail account using the secure OAuth protocol, then copy existing messages from Gmail account to Outlook.com.