You are looking for a small camouflaged container with log book, writing utensil (unless stolen so please bring your own), and trade items. You MUST sign the logbook to claim this cache. Beware of muggles.
Logging this cache earns you a smiley, but it also contains a question that would lead to a bonus cache MLSP Bonus Cache (GC4X5NJ), if interested. There are a total of 6 caches, each with a question. GC4X5FY - MLSP #1, GC4X5HF - MLSP #2, GC4X5HT - MLSP #3, GC4X5JC - MLSP #4, GC4X5JT - MLSP #5, GC4X5K9 - MLSP #6 Answer correctly to get the correct coordinates to the bonus cache. You do not have to do the caches in numerical order, however they are placed in a loop fashion.
N 40 2 A.B C 3 W 076 3 D. E F 8