Conversion of gp3 files to gpx file format

It should be possible to import previous versions of Guitar Pro (such as the .gp3 files from version 3) and re-save them to the latest GPX format. Such producedure can be most likely done by the default File ► Save as.. function and this is what will achieve gp3 to gpx conversion for you.

Open GP3 file    Open GPX file

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Guitar Pro

A multi-track editor and music composer for guitars