Maybe I have not fully understood the question. But if you just want to install a gem that you have on your local machine, all you need to do from the console is go into the directory containing your gem and gem install --local your.gem.
Maybe I have not fully understood the question. But if you just want to install a gem that you have on your local machine, all you need to do from the console is go into the directory containing your gem and gem install --local your.gem.