We're arriving Gardermoen v. early on Sat 4th May and would want to pick up a car at about 1:00 in the morning. Will your desk be open, if not what time does it open?
The website will show you cars if its open, you can obtain a quotation there and make a reservation. Enter your search criteria ( dates,times,location) and click on SEARCH.
If no car photos are displayed, then adjust your date/time as not all locations are open weekends or out of normal business hours.
If possible use a laptop,tablet or PC rather than a mobile to conduct your search.