Grofftown Road was intersected by the Walnut Street Bypass several years ago. It was a handy way to get out of the east side of Lancaster and on to New Holland Pike. But now if you are on one side of the bypass you can't get to the other side, hence the name.
The road dead ends and there is chain link fence around the perimeter. It will be a short walk beyond the concrete barrier, go around the right side and you'll be very close to the cache. Depending on the time of year, there may be lots of weird brain fruit, AKA Osage Oranges, on the ground. The hint should get you close enough to GZ to find it quickly.
Arne gryrcubar cbyr. Ovfba ghor.