So to answer my own question....Yes, the current GC-100 driver will work w/ the PowerStatusMonitor. I'm using the GC-SP1 AC/DC Input Sensor (fm Globalcache - about 30-40bucks @ cost)
You basically can use it monitor the power of a device, such as a cablebox, Receiver, etc. The device has the 3.5mm input that goes into one of the IR Ports. The other end has two leads that can be tied to a old wall wart w/ less than 24vdc. You need to adjust the inputs from the builder interface to the GC-100 (or you could use the web address, I suppose). You need to change the IR and Sensor # to change the connector from IR Out to Sensor In. Also change the Sensor notification from disabled to enabled. You should see the lights on the back of the GC-100 light for the sensor enabled port. When you plug the GC-SP1 into it, it will go off.
The last part - (well almost)...you need to change the object type for the Multi IO port from IRPort to a GCDigitalInput by selecting the type property from the properties menu. You can find the general instructions in the Help menu in the builder.
So far, it seems to work fine.