they make gh3 for pc am i correct?

yep

do u have 2 buy a xbox 360 controller is that how it works?? cause someone told me thats wat i had 2 do

you can use a keyboard but its pretty hard. the guitar is the best thing to do. or just buy the full game and play online. its like 80 for the game and guitar and you can play against people online and shit. its worth it if you ask me.

thank you kind sir