There are 2 monorails that leave from the MK station. There is the express monorail that goes from the TTC to the MK and back to the TTC.
The resort monorail leaves the MK, goes to the CR, then the TTC, the Poly, the GF and then the MK
A quicker way to the Poly from MK can be the resort launch. It stops at GF then Poly then back to MK. Usually beats the monorail which can have lengthy stops at CR and the TTC.