Does Ima Gun-Di's counter attack leadership ability stack with Aayla's and Kit Fisto's Counter?

Just to point out, the player GG's basic can't be countered or dodged, so there's nothing new there in the Raid. My guess is they've taken this trait (one of GG's strongest traits) and applied it to the ATT. Makes it kinda fluffy.

My personal experience of facing IGD teams is that Aayla hits back like Dooku... usually stunning my droids in the process. I avoid those teams like the rust plague.