We're sorry, but Gmail is temporarily unavailable. We're currently working to fix the problem -- please try logging in to your account in a few minutes.If the downtime is affecting your work, here's a simple trick to access your GMail inbox.
You can download all your unread Gmail messages using a desktop client like Microsoft Outlook or Thunderbird even in situations when normal web-access is unavailable.
Check the screenshot below: GMail website is returning an error message but the Outlook send/receive window is busy download the emails locally.
Never miss Gmail again.
Also read: Solutions to GMail Login Problems