Grblgru lathe toolbit width compensation

It would be nice to avoid the manual editing of a dxf diagram to compensate for tool width. Using a 1.2mm thick notching tool, cutting a 2mm wide notch in workpiece, for example. Either that or quite a bit of eyestrain editing gcode with g42 and g40 commands.
While I’m at it, is there any way to generate gcode using G0 and G1 instead of Fxxx?

thanks so much!