GC 100-12 Sensor ?

Please try to setup ensor like on this image:

Make sure that the sensor seted up on GC side as "Sensor with auto-notify"

Some usefull script for your task for devices that have only Power Toggle command on IR remote controller

=================================================================

var CheckPowerStatus_SAT = new CheckPowerStatus("GC-100-12");

function CheckPowerStatus(Dev)
{
var device = IR.GetDevice(Dev);
IR.AddListener(IR.EVENT_ITEM_PRESS,IR.GetItem("Page").GetItem("Power on button"),function()
{
var PowerStatus = IR.GetVariable("Drivers."+Dev+".Sensor Notify 6");
if(PowerStatus == 0)
{
device.Set("SAT_Power toggle", "");
}
});

IR.AddListener(IR.EVENT_ITEM_PRESS,IR.GetItem("Page").GetItem("Power off button"),function()
{
var PowerStatus = IR.GetVariable("Drivers."+Dev+".Sensor Notify 6");
if(PowerStatus == 1)
{
device.Set("SAT_Power toggle", "");
}
});
}

In this case you have cirtain control method