What file do you save to send to gsender?
@markG - Welcome to the group Mark. Use GRBL IN or GRBL MM depending on your design method. As always if you need help just ask. Share your projects and methods. Helps all of us too.
Yes as Heyward said, saving with a GRBL post-processor should get you the right file and the ‘g-code’ file will upload into gSender