Ambitious. Given the great diversity of shell scripting needed (even if just bash) across different variants of Linux and Unix and different platform versions,

Ambitious. Given the great diversity of shell scripting needed (even if just bash) across different variants of Linux and Unix and different platform versions, debugging the resulting transpiled executables is not something I'd be keen to take on. You'd want to be an expert in the Go ecosystem at minimum, and probably already committed to moving your utility programming into Go.