According to the travel agency, international drivers license (international driving licence or international drivers permit) should have been recognized as a valid document for driving.

Unfortunately, when we arrived in Grenada, we were required to purchase a Grenadian driving permit, because they wouldn't honor the AAA document. Grenada requires you to buy what it calls a "local driving permit" for EC $30, according to the country's official tourism. Driving in Grenada is similar to the English system, where driving is on the LEFT. To obtain a local driving permit, a bona fide driver's license must be presented at the traffic department at the Central Police Station on the Carenage. The cost is EC$30.00 or roughly £7. Most car rental firms also issue local permits.

Grenada's diverse and colorful people embrace visitors to their special island. Touring and hiking through the spectacular capital city of St. George's, along the Carenage, the semi-circular roadway sweeps around the bay reflecting the red-roofed colonial city. Local craft and spice shops mingle with international restaurants, museums, and Market Square, the gathering place for buying and selling produce and spices.

Entry Documents:
 Beginning January 2007, US citizens need a passport for all travel to and from the Caribbean, Bermuda, Panama, Mexico and Canada.

Proof of citizenship in the form of a passport or a photo ID with a birth certificate or voter's registration card for US, Canadian or British citizens and a return or ongoing ticket. Other countries require a passport or visa.
Airport:
 Point Salines International Airport
Departure Tax:
 US$19
Driving:
 On the left - A valid driver's license must be presented for a permit. Permit costs around US$12.