And just to add some more non-canon fun for you, BlackAgates but here's this:
https://swfanon.fandom.com/wiki/The_Gray_Jedi_OrderThe info (as I said) is non-canon but it's fantastic, especially if you're interested in tales about Gray Jedi
...Annddd on that note, if you really like stories about Gray Jedi, I would HIGHLY suggest you check out the Fan Fiction section; look for any stories written by Karmack for his own excellent take with the Gray Jedi Order. In fact, I would really recommend you reading ANYTHING and EVERYTHING by Karmack, Lord_S_Gray, Taegin Roan, TheDrunkenConsular, Lady Revan, and Golden Fedora; they are the most active authors and--one and all--have engrossing narratives that really add to the Star Wars mythos. I cannot recommend enough with looking into their wonderful stories!
*cough shameless plug cough*On the subject of Gray Jedi, I've written a few stories myself if you're interested