When I try and log into G-Mail on my desk top (Windows 8) - it gives me a message that says This version of Internet Explorer is no longer supported. Please upgrade to a supported server – or words to that effect.
Which version of IE are you using? Jno's link confirms that the browser IS still supported. Some applications like Citrix work better with it as a matter of fact.
You need to upgrade to the latest version.
Windows 7 and 8 are also still supported btw
In the ordinary course of events I certainly wouldn't recommend IE. I use gmail with Firefox as I've never got on with Chrome. It always seemed very slow especially starting up.