At the listed coordinates you will find, hopefully easily, the cache but in order to log the find your name must appear in the log book.
This cache is not located very far from parking or from the trail but it will require a little bit of brain power to get your name in the log. Everything you need to access the log is provided to you in/ on the cache. Please leave everything you find in the container there, other than the swag of course. There is no need to write on anything. Be advised that cell phone reception in this part of the county can be sketchy on a good day. If you can't figure it out email me, from the field or when you get home, and I will get back to you as soon as I can with a copy of what you find in the cache. Then a simple wikipedia or google search should help you figure it out. Before you give up at GZ take a look at the hint. It should jump start a memory and get you on your way. Enjoy.