1 - No dependencies besides Webknight's Two Primary Weapons. You should be fine running GGE core for any other GGE mods you want to use.
2 - Keybindings are default weapon swap keybinds. This will not work with ACE keybinds or any other mod's bindings.

So problem is, I tried waiting for 5 seconds and it still doesnt work. Again the animations of transitioning from primary to secondary works, but holstering is still an issue
1) Am i supposed to have GGE core (obviously without the gge weapon swap mod) or does it not affect it at all?
2) Where can i find the keybinding for this mod?

The script has a 5 second sleep command built into it to let things settle down in your mission before adding the functions it needs to work. Try after 5 seconds and it should work my dude.

Doesnt work, other than transitions, the character holsters weapon to back again
Any fix?