Yes. Even though your GMAW spray weldor is qualified to weld MCAW being grouped with GMAW, (Short Circuit is considered a separate process and not prequalified, see D1.1 Table 4.12 #1 & 3.2.1 & 3.2.2) and please note C-4.18, it is "The intention is that the Contractor would train the welding operator to weld using the new equipment." Also note MCAW is "normally" in spray mode and used in the flat and horizontal positions, therefore a qualified WPS within the "range recommended by the electrode manufacturer" (5.3.1.2) shall be provided. Key word before production is "Training" to use the equipment and specific process.
I will admit I disagree with AWS on this point, GMAW & MCAW should be separated for qualification and FCAWg & FCAWs should be separated for qualification. They are different enough for further training to be required to pass a qualification test for each process. -- But I will follow what the AWS dictates on any point.