def generate_gcode(cad_file):
    # Mockup for G-Code generation (replace with actual tool like PyCAM or BlenderCAM)
    gcode_file = "/mnt/data/generated_gcode.nc"
    with open(gcode_file, 'w') as f:
        f.write(f"G-Code generated for {cad_file}")
    return gcode_file