I fitted an AR grip to my Ghost as well. For those who don’t know, the biggest differences between the AR and AK grips are that the screw of an AR grip screws exactly in the 90 degrees elbow formed between the back of the triggerguard and the bottom of the action, while the AR screws about a cm (1/2”) more towards the back of the gun. Furthermore the AK grip has a much much wider slot, and lastly the inner angled mating surfaces between the grip and gun (perpendicular to the screw axis) differs by about 5 degrees.
To make an AR grip fit an AK based gun (which the Ghost is) you mostly need to do some dremelling to widen the slot of the AR grip, and then drill a new screw hole aft of the original one. Not very complicated, and if you go slow and test fit often there is really not much that can go wrong… (and worst case is you messed up a grip, and they don’t cost the bank…)