This is inspired by some cachers I exchanged a few interesting messages with. They kindly suggested this type of puzzle, based on one they themselves had come across on the Isle of Wight. So I take no responsibility for the idea!
The coordinates given are for a roundabout on the A329 - nothing to do with this cache but highly unlikely to be used for any real cache.
The cache container is a magnetic mini decon. The coordinates can be found by unravelling these numbers:-
0571105645159253571219351717120986112771
0099554321097239463X153054951500994534520857215590
At present there is no parking near GZ.
Once you have solved the coordinates this will make more sense.
Please park N of the LC. Maybe near a Battle.