Yes, that is where the chip is posted, but I don't think the letters are GL. The first letter is definitely not a G.

I uploaded that "GL" T. R. King order card yesterday, for another chip there, and that is when I saw those mystery chips posted there. I'm also not sure what the two letters on the diamond mold chips are either, but I'm pretty sure it is not GL. I was hoping to find these chips better homes on the ChipGuide.

Also, no T. R. King card for JZ, but that is still possible.