no becouse a sub is seen and made this way ...
http://redarrow.google.com
what you done is not a real sub.
each sub domain is classed as a new real domain in the eyes of google.
http://lmgtfy.com/?q=github+rank+checker. First result https://github.com/serphacker/serposcopeSerpBook, SerpFox, Proranktracker are all ether paid or have a free trial limit. Has anyone come across an open source solution?