Can I use the G5 System Adapter without a Stroller? September 27, 2022 16:35 Updated The G5 System Adapter must be used with the stroller base. It is not stable unless docked into the SmartHub on the stroller. Related articles Which car seats are compatible with the G5 System Adapter? Are my G2, G3 and O2 Strollers, Infant Car Seats, and Bassinets still under warranty? Is the G2 and G3 360 SmartHub™ compatible with the NEW G5 360 SmartHub™ system? Can the Orbit Baby Toddler Car Seat be used on airplanes?