i'm running a powermac G4 am i able to get mountain loin for it?

Sorry, no. All OS versions higher than Snow Leopard 10.6 require an Intel processor.

Not only do all Mac OS X versions from Snow Leopard up require an Intel processor as stedman said, Mountain Lion is even more restricted: http//www.apple.com/osx/specs due to the heavy graphics needs you have to have an Intel machine that meets other specs as well.