GP6 file extension - Mistaken Guitar Pro file format
What is gp6 file? How to open gp6 files?
File type specification:
The gp6 file extension is not yet used by any application known to us.
However, it is possible that you were looking for latest Guitar Pro 6 file format. Guitar Pro 6 is using GPX file format for its latest version and GP5 file format for its previous.