This cache can help with several challenges. Rhyme Time Challenge, California Multi Cache Challenge, and maybe more.
This is a simple 2 stage multi. GZ should take you to a Hercules Municipal Code sign with a hyphenated 5 digit HMC code. The first digit = X. Add the last 4 digits together to get a 2 digit number Y.
N = X*Y*10+265 and W = (-X+Y)*11+60
The final is at N38 00.N and W122 16.W.
Check sum for all digits is 52