Guitar Pro is first and foremost a software designed to edit tablatures for guitar, bass, and other fretted instruments from 4 to 8 strings.
Its great ease of use and the success of its specific file format have made it a software used by guitarists worldwide.
It now includes editing support for many other instruments like the piano or the drums, a realistic audio engine, and interactive tools to support every musician's practice.
Old test results
The test results you have selected are very old and may not represent the current state of Wine.
Selected Test Results (selected in 'Test Results' table below)
Guitar Pro 6 installs without issue, and so do all of the soundbanks that I've tried. I am able to use the program exactly as I would in windows and arguably it runs smoother than it does in windows, which I admit may be a placebo effect. There are no issues of 'stammering' or lag which I would sometimes experience in windows, and this is leads me to believe that the program runs more smoothly than in windows.
What does not
Everything works, and the only issue I could find is that when importing soundbanks can cause crashing if you drag it from a linux folder into Guitar Pro. To get around this, simply File > Open > directory of the soundbanks for things to work 100% flawlessly.
What was not tested
Some soundbanks that did not pertain to my needs, but I've used over half of them with no issues.