It does work as I have it installed on a few. Although I can't find much in the documentation to state that it is officially supported. But it's basically just a Windows 8 install and Windows 8 is supported in SEP 12.1 RU2 and up.
There is a known issue where SEP won't install on a fully patched Win8 box. See KBA here
https://www.symantec.com/business/support/index?page=content&id=TECH203996
You would need to disable Windows Defender and remove KB2781197 before installing SEP.
SEP 11.x is not supported on Windows 8.