Fairly low - may not be very winter friendly. Also, the bike path is not consistently plowed in the winter.
If you are driving, it is possible to access the bike path from the neighbourhood to the west. To get to GZ you will have to leave the paved bike path and walk along a dirt trail for a while - do not walk along the transitway, that's a no-no. The best place to park is probably on Adirondack, off Woodroffe, although it's a bit of a hike from there. However, you can grab "Fire Station 21" on the way!