The cache is, of course, NOT at the posted coordinates.
Approaching GZ, you will find a tree that looks like a spider. How many legs do you count?
Like spiders which pretend to be ants, this cache could be considered devious. When designing this mystery I thought about the scene from 2001: A Space Odyssey, "Open the pod bay doors, HAL!" There's a story about how HAL 9000 got its name, which is helpful here.
A73A180448583A18386939042A980458883818380458883E
2A58589978584804585899883A048A3A9998883A04883A99695D
2A583A4A59984904696A3A0459585A582A04994A6968043A59986979045958583A88789858
2A5858997858480459585A5839580448589948594A8804585969043A2A586E
2A583A4A599849045859985904585A98680458599859043A599869790458599859048A3A689868
Good Luck!
NOTE: Unless you're tall, bring a TOTT.
You can validate your puzzle solution with certitude.