There are certain landmarks I never miss as I travel this road, I hope you will understand why this is one of them. (If you're not sure, just say the name of the cache out loud.)
The cache is not at the given coordinates because there's not enough off-road space right here.
It is best found when travelling towards Murchison.
To find the hiding place of the cache project the published coordinates using a bearing of 008 degrees and a distance of 250 metres.
If you need to visit GZ to do that please park sensibly and take extreme caution on the road.
If you're not too flash with technical stuff you could just continue along the road for 250 metres and take a look at the base of an obvious post.