We have found 3 software records in our database eligible for .gp5 to .midi file format conversion.
Guitar Pro multi-track editor and music composer is able to export both the tablatures but also MIDI audio from any of their projects (regardless the version). You will have have to use the original software in proper version if you hope to convert (export) gp5 to midi.
Updated: September 23, 2016
A professional multi-track editor and music composer. Musicians uses Guitar Pro to create guitar and bass tablature. Also is used to write musical scores. It is available in versions for Windows, Mac, Linux and iOS.