Can you just run the pump? Water in pipes has to freeze solid before they break. The temp probably won't be low enough and long enough to do damage. The mass of water in the pump and filter won't even come close to freezing in one night. If your gauge is on the filter you'll probably lose that. It's a low thermal mass and water in the tube will freeze and screw up the zero and calibration. Cheap to replace or if it's good now just unscrew it and take it inside. If you have a multiport valve on top of the filter put the handle in an intermediate position to let water drain out of the valve assembly. Being north of you all I plan to do tonight is wake up around 3 and run the pump for a couple minutes and go back to sleep. Being lazy I'll just put the laptop by the bed and won't even have to get out from under the covers to do this.
Al