Basics: Installation with CLI

I've installed GitHub Desktop and Git Bash on my local Windows 8. Cloning the Grav package to my local host worked fine. Now I try to run the "bin/grav" and "bin/gpm" commands using Git Shell. However, I get the following response:

Helpme

When I follow the advice it provides me, "./bin/grav", I get prompted with what program i'd like to execute.

Do you have php.exe in your path? https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=add%20php%20to%20windows%20path

If you don't, then you will have to call the command with the path to PHP:

$ /path/to/php.exe bin/gpm index

Thanks, that helped me!