I worked 5 years as Welding Procedure Engineer in the CWB, so let me answer your question here:
In new CSA W59.03 Standard, MCAW has been recognized a seperate process, so it is not FCAW or GMAW. Latest CSA W48 "Standard for filler metal" also shown metal cored wires as part of MCAW process.
That's why, if you check my Canadian site
http://www.weldcanada.com , you will see MCAW is considered a seperate process.
Of course in AWS D1.1, metal cored wire as well as solid wire are considered GMAW
Hamilton