No, you need to use the freebase, as it is more reactive. However, you can easily make a solution of methylamine gas in methanol, and use that in the reaction, so there is no need to handle the gas.
For the exact procedure, see https://www.thevespiary.org/rhodium/Rhodium/chemistry/10pc-menh2.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/10pc-menh2.html)