If in summer, from the cache you'll be seeing some big ships and hopefully some nice weather. In winter you won't have either of these, but at least you can look for this cache!
While you are here you can either take a book from or give to the little library as well!
Now to the cache. This is a very small cache and only contains a logbook (so BYO pen). GZ is pretty easy to access with a ramp leading to the spot but to get to the cache you might need to bend the knees a bit!
Good luck!