This is a multi cache with the spirit of a mystery.
To find the hide you will need to make your way down the short street opposite wp1, checking poles left and right as you go. There is no need to deviate from the one street, or go onto private property.
On any pole where you see six numbers presented in a consistent font, you will need to interpret and apply these in a certain way to find gz.
Only one of the poles will lead you to the hide. It will, if used correctly, direct you about 517 metres from where you take your reading. The hide will be within 10 paces of this location.
It should become apparent on your approach.