If you have been trying to log into your Gmail account and have been unable to do so, you are not alone. A number of Gmail users have taken to Twitter to report they cannot log into their Gmail service; there also appears to be problems with other users with logging into Google Drive at the moment.
Google's own App Status Dashboard page does show what appears to be a partial service disruption, but at the moment it does not appear to be covering all users of Google's online services. It also does not appear to be affecting services such as Google Calendar, Google Talk and others.
Google has not announced what might be causing these problems nor when they believe they will be addressed. Of course, we will update this post when these issues are fixed.
Update: Google's status website now says all of their online services are up and running fully.
Source: Google Apps Status Dashboard | Image via Google