I'm interested in this as well, I've been reversing #Reload on PC and found the hit detection function but haven't quite figured out how the game pieces together the hitbox data for each character. Looking at those pictures I see that normals can also have more than 1 active hitbox (as well as projectiles) so that's good to know.
I've been piecing it together little by little in my free time in IDA, ollyDBG and cheat engine to debug. If someone has more information on how the hitbox data is generated in game, it would save me time and I could make an overlay that would display them in real time, the same way I did for vampire savior and super turbo.
ST:
http://shoryuken.com/forum/index.php?threads/super-street-fighter-ii-turbo-ggpo-hitbox-overlay.143840/
VS:
http://shoryuken.com/forum/index.php?threads/vampire-savior-ggpo-hitbox-overlay.151676/
So far I've found the hit detection function, but that's about it, it's quite a pain piecing it all together, but assuming not much changed in how the game generates the hitboxes I could make an overlay for Accent core plus as well that would just overlay over an emulator. Just a glimpse of some of the notes and progress I've made:
But rather than trying to reinvent the wheel if someone has done this before, I'd appreciate the information and be glad to release the overlay for all to use. I've tried googling "Joe Higashi" with numerous words attached such as "hitbox" "guilty gear" etc. but googling a character from a fighting series with hitbox in it brings terrible results.
TLDR: If someone has the old information on how the hitboxes were obtained I can make a overlay for everyone to use for all versions of guilty gear.