Those are wired sensors that are all wired into the same wired “zone” and then translated to a wireless sensor in order to communicate with the 2GIG panel. From the control panel’s perspective that is just 1 sensor. In other words, those sensors are grouped together by being physically wired together, not by any programming in the control panel. There is no reprogramming you can do to separate them. If you want to separate them you will need to find where the wireless translator device is that is converting that wired zone into a wireless sensor and you would have to re-wire it to remove the garage window sensor from that zone.
The wireless translator device could be a 2GIG super switch takeover module
or it could be a door/window contact that has a wired sensor input
Are you able to see where the wires from those window sensors go? What are they wired into?