Hi @Herb22,
if you watch the GRBLGRU grange video you will see that it refers to a work published on GitHub.
I hope you can find what you are looking for, and publish here examples of the macros you intend to create, they could be an inspiration for many, including me .
A greeting,
Cator

https://youtu.be/5UIVro7R7AU?t=193

https://github.com/NRSoft/GSharp