Go language highligter for adobe brackets.io
Some languages are not included in brackets.io you can use extensions to add them, it is very easy as long as they are supported by CodeMirror. List of the languages can be found here: http://codemirror.net/mode/index.html
The link below provides information on language support in brackets.io https://github.com/adobe/brackets/wiki/Language-Support#defining-a-new-language
Here you cand find information about writing extensions for brackets.io https://github.com/adobe/brackets/wiki/How-to-write-extensions