The cache is not located at the published coordinates but is 30 meters away along the fence to the South.
To make it easy there is a black mark on the fence at the GZ. Start measuring from here.
If you do not have a tape measure then you can calculate using the following approximations:
From the mark to the first pole is 0,5m. The gaps between the poles are two meters wide and the gate is 3,5m wide.
All measurements are approximate. Also remember the GPS error of +/-5m.
If you battle with arithmetic see the hint.