Here is what HGM says about the program.
With that situation I am not going to test it, so this will not get a rating.
The author of GA-Sho has granted permission to redistribute his engine, but because of the excessively large size of the GA-Sho evaluation-parameter file (some 83MB) it seemed better not to include it, but just pre-configure WinBoard to use it, and provide a download link. Potential users should furthermore be warned that GA-Sho is an extremely demanding program: it always uses 8 threads even if you have fewer than 8 CPUs, and it requires 6.5GB of RAM.