script-fu is a GIMP thing. Basically, it uses a series of GIMP commands, etc.
G’MIC is a separate app and a plug-in in GIMP. Try using the New layer(s) + Verbose (layer name) combination in the G’MIC plug-in window as follows:
It would name the new output layer with the correct command, provided that the plug-in is also >2.0.0, from which you would copy-paste the command as I have above.