Format: Guitar Pro File Format (.gtp, .gp3, .gp4, .gp5, .gpx)
Music-Notation.info 2014-10-19
Summary:
There is no official documentation for the Guitar Pro format.
dguitar has an extensive description of the Guitar Pro 4 file format.
A good starting point to understand the format is the reading routines of KGuitar. See convertgtp.cpp in kguitar.svn.sourceforge.net/viewvc/kguitar/trunk/kguitar/kguitar/ (GPL)
.gpx is a compressed file format introduced with Guitar Pro 6.