Wikipedia:Articles for deletion/Square of Nine
Mentioned in https://www.google.ca/search?q=%22Square+of+Nine%22+gann&client=firefox-b&dcr=0&tbm=bks&ei=rNmZWq_LKMLatQX4lLOwCQ&start=10&sa=N&biw=1366&bih=641&dpr=1 plenty of books so I would say it meets . May need to be edited to comply with 
— User:Derek, 23:25, 2 March 2018 (UTC)
Stance: keep
Cited policy: WP:NFRINGE||WP:FRINGE (Wikipedia:Fringe theories)