It's great idea. Do you plane make smth like GuitarPro in the future?
A complete GuitarPro-like program would exceed my skills, I guess.
It is a complete notation and music-playing system.
My work is "only" derived from "Chord4" a successor of the legendary "chord" program. It's quite useful anyhow. You can load a lot of sources for ChordPro format and do transposition.