This one is not real hard and it will give you an idea of the old way and the new way.
My Garmin GPS III+ showed I was only 1 foot off.
To validate your find :
You need to post in your log a picture of the Geodetic Survey Marker WITH YOUR USERNAME VISIBLE, CLEAR AND READABLE written on the medium of your choice (paper, hand, phone, t-shirt, etc...).
Pictures taken with only yourself, your GPS or your Logo/Avatar are not accepted as well as photoshopped/edited pictures with your username inserted afterward.
You also need to write in your log the exact coordinates of your GPS at GZ, to see its accuracy.
Failure to follow these instructions will lead to your log deleted.
Thanks to Varmint1 for letting me adopt this virtual cache.