I\'m install the go with the go1.3.1.windows-amd64.msi, after installation GOROOT is default setting, I found the D:\\Programs\\Go\\bin in the PATH,then I create a GOPATH envi
I faced with the same problem. However i set everything as it was said in the tutorial but forgot to restart cmd. So the steps were:
Go distribution(the GOROOT variable was set automatically)bin, src and pkg-> All Control Panel Items -> System -> Advansed System Settings -> tab Advanced -> Environment Variables -> add new system variable by clicking New on System varaibles -> Variable name = GOPATH, Variable value = Your:\directory\that\you\createdcmd or Bash(that's important) and you have your GOPATH set. To be sure run go env and you will see your value.