You can use Fusion 360 to generate G-Code for your machine. Simply install the correct Post Processor :

Click on your Name in the top-right corner, and then on Preferences:

Click on Manufacturing on the left, and then make sure the checkmark is set next to Enable Cloud Libraries

Open your Assets library

Go into the CAMPosts folder

Click Upload, select the downloaded OpenbuildsFusion360PostGrbl.cps file and Upload it

Proceed to setup your CAD/Toolpaths as you would normally, generate the Toolpaths, and then Post Process:

=== 3.1 Post: Use Cloud Posts

Click Setup > Use Cloud Posts

Select the Post Processor from the dropdown menu:

There are several parameters you can adjust to your choosing to tweak the behaviour and features of the Post

For example, setting the Router type - will include the recommended Speed Dial value in the G-code comments