From the description in the README file:
"GoCaml is subset of OCaml in Go based on MinCaml using LLVM. GoCaml adds many features to original MinCaml. MinCaml is a minimal subset of OCaml for educational purpose. It is statically-typed and compiled into a binary."
What do they mean with "GoCaml is subset of OCaml in Go"? Do they mean the compiler is written in Go?