This cache can help with several challenges. Rhyme Time Challenge, California Multi Cache Challenge, and maybe others.
This is a simple two stage multi. GZ should take you to an opening in the fence (a gate used to be here). On the left is a gate post with a 4 digit number. Add the 4 numbers together to get a 2 digit sum (x).
N = x²-131 and W = x²+195
Final is at N38 03.N and W122 14.W.
Check sum (all digits)= 54