This repository has rich code base and working example of Google Go Lang. It has code to explain concepts like struct, pointers, channel, go routine etc with several other mini projects as well.
I have explained some of the code in video tutorial of Go lang. Please check it out. https://www.youtube.com/playlist?list=PL13Vva6TJcSuOBVDUuG6gMVlCf5xvGN9Q