It works for me. You will have a problem with RAM or storage (the program still downloads data from the net). Try to perform the extroot and convert the entire root to an external repository. Also see if you have enough RAM (enter free with ssh).
Turris Omnia with OpenWrt 21.02 - Tested
Linksys WRT3200ACM with Gargoyle 1.13.x
TL-WR1043ND v2 with Gargoyle 1.10.0
http://gargoyle.romanhk.cz custom builds by gargoyle users
https://lantisproject.com/downloads/gargoylebuilds for the latest releases
Please be respectful when posting. I do this in my free time on a volunteer basis.