Both GBSW and EEF1 can parallel, I am not sure about EMAP. When view file charmm/source/emap/emapdock.src emapfield.src emapop.src emapsubs.src, only emapsubs.src has key words:
I am not sure which command to call when you run (may be it will display in run.out if you add 'PRNLEV 15' in your run.inp file, or may not).
If emapdock.src, emapfield.src or emapop.src were used, I guess it cannot parallel. Actually, I'm not familiar with EMAP.