I tried it with "Gameobject is null" but it didn't work, plus it don't make sense to work as long as a deactivated object is not null. I checked 3 times Playmaker's actions and I find nothing related to this except "Activate GameObject" but I don't see how I can check it with this action.
What I actually need is to send to different events regard to GameObject's status, if it is activated or not.
Is there an action I don't have/didn't see or I should do it another way ?