Pick-up:
After arrival, stay on the Swiss side of the airport and follow the signs to the on-site rental counters. After collecting the contract, leave the building and take the car rental shuttle to car park P51. Go to the counter to process the rental there.
Geneva Airport
Le Grand-saconnex, CH, 1218
Return:
Genève Aéroport Parking P51 longue durée
Google maps code: 64G2+PW Meyrin
Plus codes work in a similar way to addresses. You can use them to retrieve a simple digital address.