From the Yellow Trailhead, you can hike the loop in either direction to arrive at GZ (the entire loop is .77 mile). Trail markers are spray painted on trees and are frequent so you should have no trouble following the trail. The cache, which is just off the Yellow Trail, is a camouflaged watertight plastic container.
The park is open sunup to sundown and dogs must be on a leash. Click here for more information on Webb Mountain Park on the Monroe Parks & Recreation site. Click here for a map of the park.