Guitar Pro 6 is not maintained anymore but it is still provided as a 32 bits deb package for native Ubuntu/Debian install.
I could not install the deb package 32 bits on 64 bits Linux OS because of package dependencies. There are some old answers to this problem and none worked for me on Ubuntu Studio 19.04 (How to install Guitar Pro 6 on Kubuntu 15.10 64bit?).
When i try the docker solution:
docker pull aviggiano/guitar-pro-6
xhost +local:root
docker run -e DISPLAY=$DISPLAY -v $HOME/.Xauthority:$HOME/.Xauthority --net=host -v /tmp/.X11-unix:/tmp/.X11-unix -it aviggiano/guitar-pro-6 /opt/GuitarPro6/launcher.sh
The GUI Starts now but no sound and Guitar Pro 6 does not appear in pulseaudio volume control.