There is a trail head at each of the listed parking waypoints. There are likely other places that you could park and perhaps find a trail head.
Enter during daytime only, stay along the path and do not damage any plants or vegetation. You might come near some stingy nettles and blackberry bushes along your hike to this cache. But these should not be any problem if you stay on the trail.
Somewhere along a main trail between the Gresham City Saddle Trail and the water tower on top of Gabbert Hill is the cache. When you see a post and it seems as if GZ is near then consider wandering a short distance to the West. Return the black Yuban jar cache to the same location with natural camo and out of plain sight. Enjoy the hike.
Please follow these simple guidelines or simply do not look for this cache:
BYOP - Bring Your Own Pen - do not put a pen or pencil in any of my caches please.
Sign the log sheet - do not claim to find this or any of my caches without signing the log please.
Carefully open the container/baggie, completely seal baggie with log inside and tightly close container.
Replace cache out of plain view to same location in description/hint = simply Hide the cache.
If you do not like the posted coords then post your own but do not move the cache to a new location.