...but I can't seem to use it as a trigger in setting up rules...
Sounds to me like he merely added/included it to panel as a generic zwave device.
This will not function as a PIR alarm Initiating security sensor, or as a sensor trigger device for zwave empower automation rules.
All 2GIG panel supported security sensors are 345mhz/900mhz (PIR motions/image sensors, door/window sensors, smokes, CO, glass breaks, etc) Zwave security sensors are not supported. Zwave garage door controls are not suppprted. ZigBee devices are not supported at all.
Supported zwave devices (automation only):
Sirens, light switches, outlets, energy meters, thermostats, locks