Hello,
If anyone is interested in using Solidworks CAM or CAMWorks then I've put together a post processor for our machines. It's hosted on github at https://github.com/msbealo/GRBL-Post .
It's still under testing and development but I think it looks about right. I've been testing it on my controller but I've not made any cuts yet as my machine is in a rebuild. Please let me know on here or on github if you would like any modications.
Regards,
Mark
P.S. Please use caution.