That's where I think the "star" (as in GCS) vs "medal" (as in GSM) is not a bad line to draw. It's based on geo location - if you were in/over (under, I guess, if sub crews are involved in a future conflict) then you get the GCS. If you were deployed outside Canada, but not in that theatre specifically, you get the GSM. This is where I think there should be either a third medal, or to expand GSM to remove the "outside Canada" bit.
I've said this previously, and the article mentions it, the interesting cases would be RPAS and Cyber - they are not in the geo area but have direct effects on the AOR - whether it be launching a Hellfire from 10000 km away, or sending a virus that cripples the enemy's comms structure. If the GCS and GSM require deployment outside Canada, then those folks may never receive recognition*.
While there has been precedent (ask how many medals the LRP crews got before Op Mobile kicked off), that's not reasonable. Then again, there is always uproar in some US military circles whenever the idea of a medal for RPAS crews is announced. The USAF has the Remote Effects Campaign Medal
which fits the intent.
* Yes, others don't receive recognition at this time either, like SAR crews or NORAD crews. I think they should get recognition as well, be it a SAR medal after X time or something like that.