Good luck with that! I used to scour the Internet trying to find free scores for CG, but most of the stuff out there was subpar quality. But I also came to realize that I wanted quality pieces to play so I began to seek out composers that wrote/arranged for the CG and paid them for high quality arrangements. After all, I would be playing these pieces for years and the small amount I paid would support the composers and keep people writing for the guitar.
There's a free transcription (not easy!) available made by K. Minami (Japan). It's not allowed to post the link here, because the site contains material with doubtful copyright status, too. If you send me a private message with your mail address, you'll get the music.