Welcome to Stanaback Park. This cache was hidden in conjunction with GC8HKCQ, ?Puzzled? - A Community Celebration Event. This is one of 6 caches in the series; acquire the bonus info from each cache to find a bonus cache!
This puzzle is a "spatial awareness" type. All the information you need can be found in the general area. A little bit of notework should quickly yield the numbers you need to find the physical cache. These types of puzzles encourage interaction with your surroundings and cannot typically be solved from home.
The cache can be found at the following coordinates assuming N42 53.ABC W085 35.XYZ
Near GZ, you should spot two distincly different playground structures. Use the eastern playground to solve for ABC and the western to solve for XYZ.
A = # of windows in the blue tube
B = # of merlons (blocks) on the castle tower top
C = # of blue twisting slides
X = # of 3D bats in the cave + # of bolts at the top of the rock wall
Y = # of black climbings discs - red steering wheels - white(ish) slides
Z = # of frogs in the mulch