i think you need to send it to them once your scores come in, unlike AMCAS. Here is the notation I found on their official website. They won't get it automatically. Hope this helps
MCAT scores must be sent electronically
from MCAT in order to be considered
official. You can log into your MCAT account
via the MCAT Testing History (THx)
System and have your scores released
to AACOMAS. Scores are sent to AACOMAS
using your eight digit AAMC/MCAT
number as identification (This number
generally begins with a 0 or 1.)