I use these Mount Anything's to affix magnetic tool holders to Gladiator wall panels.  Within reasonable weight limits, you can attach anything with a screw hole to your Gladiator wall panel.  I've remixed these to hold the Python AMS on the wall fully loaded with filament https://www.printables.com/model/1102606-wall-mount-brackets-for-python-ams-enclosure, with no issues.  Another remix is holding a couple dozen rolls of filaments on a total of three hooks.

I'm providing four versions: M6, M8, #10-24, and ¼-20, all 10 mm deep.  At these thread dimensions, your 3D printer is printing an approximation of the threads, and your screw will cut the actual threads.  The M6 and #10 versions are 10mm wide; the larger threads are 12mm wide.   There's a bit of embossed text to remind you the thread size.  

Print with extra perimeters and increase infill percentage if you'll be attaching more weight.  I always use PETG for functional prints.  PLA should be OK for lower weights.