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 telephone pole with a 9 digit number. Add the first 4 digits together, add the last 5 digits together and multiply the sums then double the product to get X. Add X to 609 to get your North coords (N38 00.yyy). Subtract X from 562 to get your West coords (W122 17.yyy).
Final coords check sum for ALL digits: 61