At stage 1 GZ a quick review of the park sign and some basic arithmetic .. you will find your way to the final ...
You are Solving for ... N 26 47.A49 and W 080 02.B60
A= The 3rd Number of the address as posted at Stage 1
B= The last Number of the address as posted at Stage 1
(Check Sum = A+B=6)
Please do not stop and talk to Pi during your search ... he will just go on forever! 
Note of interest ... The Most Easterly Cache in Florida is located in this park .. GCGW0H - Ocean Reef Park, ( Premuim ...)