The only brown GMK set I'm aware of is GMK Mint Chocolate:
Show Image
(https://i.imgur.com/a2nCS4k.jpg)
That said, I really want to run this at some point:
Show Image
(https://i.imgur.com/URcCZD3.png)
Show Image
(https://i.imgur.com/hPV2McA.png)
I'm a big fan of the 2nd one, I would definitely support it.
The Coffee set from a few years ago on KeyPop?
Show Image
(https://i.imgur.com/mSlEMAS.jpg)
Not sure of the availability nowadays.
Is that GMK?
Either way I like it a lot and would like very smart on a walnut board