Visitors to Gmail service are being greeted with server errors worldwide, when trying to access their mail accounts. Google acknowledged the problem, and has put up a status page on Gmail’s Help page: “We're aware of a problem with Gmail affecting a number of users. This problem occurred at approximately 1.30AM Pacific Time. We're working hard to resolve this problem and will post updates as we have them. We apologize for any inconvenience that this has caused.”
Google has created a sub-domain, and all Gmail outages are directed to “sorry.google.com”. Here’re somse insteresting errors: 
I've seen this page many times