My experiences so far; the amount of pitch shifting has mostly been up by about 5 or 6 semitones, 061C#- 057G and 092G# to 096C but also one of a full octave of semitones 047B down to 036C. (Midi note numbers)
I've been working with the Enigma set adding a few stops from Enigma to Stiehr Mockers. Most Enigma stops are 56 notes for manuals 036-C to 091-G, 25 for pedal, 036-C to 060-C , a few are only 44 manual, 048-C to 091-G. The Enigma set will work with GO, but you will have to write your own .organ file. Easiest way would be to add the stops you want, and do some sneaky copy/paste to amend and existing one, and try to remember not to play the top 5 or 6 notes when the stop is in use.
All 4 of these applications are Freeware.
Wavosaur, seems to perform the shift OK but can screw up the loop markers and also give incorrect action on Midi Note off command. Fade outs not affected. On some files it changes data such that they will no longer load into GO. Does not change Midi note number within file.
http://www.wavosaur.com/
Audacity also performs the actual shift OK (when you eventually find the tool!!) but strips off all markers, including loop, truncates Fade out as shift up progresses, but this can be replaced within Audacity. Does not change midi note number within file.
http://audacity.sourceforge.net/
Endless wav, this will apply loops and optimise zero crossing loop start and end. Also has facility to apply correct Midi note number after Wavosaur/Audacity screw it up.
http://www.brothersoft.com/endless-wav-135923.html
Hex Editor Neo this is a bit more complicated, it displays the contents of any file in hexadecimal and where relevant as printable text alongside the hex. It's what I used to get the file extracts I posted yesterday (I added the colour for clarity ..... I hope) You can also edit byte by byte if you feel brave; make very sure you have a copy of the original available so that if something doesn't work you can always go back to square one.
http://www.hhdsoftware.com/Products/home/hex-editor-free.html
After all this I'm still having a problem with one stop, the Trompette en Chamade 8', keeps crashing on initial load originally crashed at 037-C#, now at 058-A# which has not been pitch shifted!! The other stops I've done so far all load OK, just the problem of note termination to solve.
Added to the extended SM set so far,
Pedal, Principal 16', Tuba 16' extended from 060-C to 067-G
Great, Bassoon 16', Gedackt 8', Diapason 8', Principal 4' extended from 091-G to 096-C
Positiv, Trompette en Chamade 8' Extended 048-C to 036-C and 091G to 096-C