ShackTac Map Gestures documentation is maintained here:
http://dslyecxi.com/shacktac_wp/shacktac-mods/shacktac-map-gestures/

You can report issues with it here:
https://gitlab.com/shacktac-public/general/issues

Usage of ST Map Gestures (STMG) requires agreement with the following terms. The mod (STMG) may NOT be modified, included in other mods in whole or part, used for military training or any commercial purposes whatsoever, without prior permission from the author. Redistribution of the addon via 6updater/PwS etc is permitted only if it is unmodified and free of charge. Modifications are forbidden without prior permission from the author.

You can reach the author (dslyecxi) at dslyecxi@gmail.com