Check out this coverage map for the subscription zone: https://fizz.ca/en/coverage
Quebec city is definitely in the subscription zone. Not too sure about the Gaspesie, but you can enter an address to confirm.
Only the Ottawa area is covered for other provinces.
If you ever need a referral code in order to have 25$ on your 2nd payment, this is mine K61CD
To be inserted when you create your plan and the total with the taxes are shown.