If you want someone to cut your parts you do not need to produce the Gcode you only need to supply a DFX file

Gcode is produced from CAM which has specific Post Processors to suit the machine being used to run the Gcode

When you want to get your machine running only ask a question as you come up to each hurdle as your more likely to get more replies that way. It's not something that can be learned in a short time.

HTH
Phil