Silkworm gcode

Hi, I want ask you, if someone is able to create g-code with silkworm. I’m trying, but I don’t understand how i can personalize the path of my object. I don’t know if i have to create it with grasshopper, or i can imoprt it with a simple mesh, bprep, surface ecc. If someone can help me, please contact with my e-mail.