Parking is very relaxed in Grenada and you simply need to be considerate in most places. There is greater control of parking in the capital St Georges but even there, it’s possible to park without trouble.
Most places don’t have paid parking because there’s plenty of free parking available. In the capital you’ll find enterprising locals charging for parking on their land but for much of the time it’s unnecessary.
There’s little enforcement of parking as much of it is free. As long as you don’t park inconsiderately you’ll be fine.
You won’t find concessions for disabled drivers – mainly because accessible parking is available in most places. If you need help, try to find a local – many are willing to help tourists out as tourism is important for the island’s economy.