My old colleague had one with a Go program[0] which I always thought was quite cool.

[0] https://github.com/GL-Kageyama/UNIQLO_Akamai_T-shirt_Code

I wasn’t sure if you meant a Go solver or Go the language. Would be fun if someone wrote a Go program in Go

I got one this year with the Go code. Never actually thought it is legit code, just some random stuff.