The list of gcodes and mcodes supported by simCNC:

G00 – Rapid Move
G01 – Linear Move
G02/03 – Arc Move
G04 – Dwell
G10 – Tool Offset and Work Offset Tables
G17/G18/G19 – Plane Selection
G20 / 21 – Unit Selection
G28 / G30 Return Home
G31 – Probing – Probe number 0
G31.1 – Probing – Probe number 1
G31.2 – Probing – Probe number 2
G31.3 – Probing – Probe number 3
G32 – Threading
G40 – Accepted but not used
G43 – Set Tool Length Offsets
G49 – Disable Tool Length Offsets
G50 – Accepted but currently not used
G53 – Move in ABS Coordinates
G54 – G59.3 Work Offsets 1- 9
G64 – Set precision value (CV)
G68 – Rotate Coordinates Command (version 3.300 and newer)
G80 – Cancel Canned Cycles
G81 – Drill Cycle
G82 – Drill Cycle with Dwell
G83 – Peck Drill Cycle
G90 – Distance Mode (absolute)
G91 – Distance Mode (incremental)
G92 – Temporary work offsets shift (version 3.300 and newer)
G94 – Accepted but currently not used
G98 – Canned Cycle Return to Z plane
G99 – Canned Cycle Return to R plane

M01 – Program stop
M03 – Optional program stop
M04 – Rotate spindle clockwise/counterclockwise
M05 – Stop spindle rotation
M06 – Tool change (tool change script activation)
M07 – Mist on
M08 – Flood on
M09 – Mist & flood off
M30 – Program end and rewind

M62 P0 – enable output synchronized with trajectory number 0
M63 P0 – disable output synchronized with trajectory number 0
M62 P1 – enable output synchronized with trajectory number 1
M63 P1 – disable output synchronized with trajectory number 1
M62 P2 – enable output synchronizedwith trajectory number 2
M63 P2 – disable output synchronized with trajectory number 2
M62 P3 – enable output synchronizedwith trajectory number 3
M63 P3 – disable output synchronized with trajectory number 3

Description of the gcodes will be released soon. The definition of G2 / 3 is in accordance with the ISO standard.