http://www.cic.gc.ca/english/visit/supervisa-who.asp
Visa-Exempt Visitors
You may need a temporary resident visa to visit Canada, depending on your citizenship. However, if you are visa-exempt, you may still benefit from the Parent and Grandparent Super Visa provisions.
http://www.cic.gc.ca/english/visit/supervisa-how.asp
Visa-exempt visitors
If you do not need a visitor visa to enter Canada, you are still eligible for the benefits of the Parent and Grandparent Super Visa.
If you would like to enjoy a two-year authorized stay in Canada, you must:
submit an Application for a Temporary Resident Visa [IMM 5257] to the nearest visa office; and
provide additional supporting documents with the application.
If the application is approved, you will be issued a letter to present to a Canada Border Services Agency officer at the port of entry when you arrive in Canada. The officer may authorize a visit to Canada for up to two years.
Note: Visitors from visa-exempt countries do not need to submit fees with their application.