The cache is not at the posted coordinates.
You must complete the Gibson Guitar Town Adventure Lab to obtain coordinates to this cache. The coordinates for this Bonus cache will be given to you on the last journal page.
Don't forget to look around when you are at the final coordinates to view one last mural!
The Adventure Lab can be found by downloading the mobile app from Groundspeak. After completing all five stages of the Gibson Guitar Town Adventure Lab, you will be shown the coordinates for this bonus cache.
You can use this link to access the Adventure Lab: https://labs.geocaching.com/goto/GibsonGuitarTown
Enjoy the tour of Walldog Murals. If you have a problem locating any stage, look at the map to see the locations!