Another way you could possibly approach it would be to create a custom action that uses the component reference to then get the GameObject it is attached to. The .gameObject property ([url].https://docs.unity3d.com/ScriptReference/Component-gameObject.html/url]) would be handy for this.
You could set up an FsmObject variable as an input for this custom action, and set it's type to the relevant component, which would then let you have a super handy interaction with PlayerMaker itself.
This could be way off the mark, as I'm a beginner, but this is the approach I've been taking when working on my own project and it has seemed to work really well, as PlayMaker's ability to work custom scripts into actions is super handy for specific stuff like this.
Best of luck!