The naming is likely a mix-up with a program from another market; Saskatoon does not run a dedicated accessory suite grant under any neighbourhood name, Grosvenor Park included. Grosvenor Park itself is a real, established Saskatoon neighbourhood, so the confusion is the grant name, not the location.
What actually exists is a permit process, not a grant, and it works the same way across the city: a development permit confirms the zoning allows a secondary suite on that lot, and a building permit confirms the construction itself meets the building code for livable space.
Skipping the permit does not save money the way it looks like it does, because an unpermitted suite is exactly the kind of improvement an online estimate misses and a lender will not count. Get your hand-reviewed valuation from Joel Dyck.