Not only are there lots of possibilities for the hide, but if you choose to do this during the day you'll definitely be watched, especially by the receptionist in the office directly behind GZ. Patience and persistence will be required, but try not to draw too much attention to yourself. It may be best to recon this one during the day, and return when it's dark. Bring some tweezers or a pin to extract the log, and BYOP.
In our Caching Around series we've created hides that span the full spectrum of the Difficulty Rating, including the half-stops. You'll see the listing below, showing the difficulty rating then the Caching Around series number. Click on the number to be taken to that cache page. If you're new to the series, why not start at the 1.0 and work your way up to the 5.0 cache. You'll even be able to complete all the ratings by selecting caches that are in geographical proximity. Happy Caching Around!
1.0 - Caching Around #15, #16
1.5 - Caching Around #5, #6, #7
2.0 - Caching Around #2, #17
2.5 - Caching Around #8, #11
3.0 - Caching Around #1, #3
3.5 - Caching Around #13, #20
4.0 - Caching Around #4, #9, #10, #12, #18
4.5 - Caching Around #14
5.0 - Caching Around #19