Guilty Gear XX Bros. Comics Anthology Manga Vol. 1 : Arc System Works, Sammy : Free Download, Borrow, and Streaming : Internet Archive
Guilty Gear Comic Anthology - 02: Sakkai Memoir (Rekiko Komatsu) + mangaka comments/sketch pages for chapters 1 & 2. Scanlation by me : r/Guiltygear
Guilty Gear Comic Anthology 01: SLAVE TO THE GRIND (Sauta) - Scanlation (by me) for the first chapter of the Missing Link manga from 1998 : r/Guiltygear