Package graphql implements the graphql spec https://sevki.co/2rmgfV
Go implementation aims to give users tools that are necessary to implement their own GraphQL endpoints.
Details and the spec of the package are not yet public, once they are chances are they will show up here https://sevki.co/2rmgfV.
Facebook has written about this http://facebook.github.io/react/blog/2015/05/01/graphql-introduction.html talked about this https://www.youtube.com/watch?v=9sc8Pyc51uU.
I've also written about on my blog https://ffbyt.es/C39Q