GAFE is a acronym for Google Apps for Education. Google is currently offering schools a hosted solution for their Email, Calendar, Docs, Drive, Sites, Sheets and chat through Google Apps for Education, an integrated communication and collaboration solution. Additionally, you can complement the core suite to meet your needs, with access to dozens more Google applications.
Core Google Apps for Education suite is described in detail on the Education products page.
Below is a video describing Google Apps for Business. GAFE is the a special version of Google Apps for Business for education.