One of these style tram cars can be found still today at a local you pick blue berry farm in Manchester, NJ. The name and street address escapes me right now, but the next time I drive by I will make a note of it. I don't know for sure if it is one from Great Adventure, but I would imagine it would have to be.
Most of the time it just sits out front of the farm and they still use it to transport people out to the. Blue berries on their busiest days during picking season.