Hi, Wayne
Have you looked at the MDI Input line and the MPG window, It pop's up with "ALT" key.
Converted a IR water jet 5' X10' z 22" , Fanuc control to Mach3, Using a wireless key board and mouse.
If your working in Inc G91 then MDI G00 x10 y10 will move you around or add 4 button's to screen's and mpg pop out window.
Hard wire jog pendant, Config Mach to read switch position's and carryout moves.
There are many options, simple or complex.
Just some Thought's, Chip