Tamiya doesn't list a Panzer Gray. A German Gray, yes...coincidentally, I already have it in my spares box from a few years ago, synthetic lacquer TS-4:
https://www.tamiyausa.com/shop/spray...4-german-gray/
Don't know if it matches. I think I remember from some thread that "German Gray" at least for uniforms has a touch green in it, but I don't remember anything properly these days
The cap looks reasonably gray FWIW...