Take my advise.. what i did previously...
First DONT rely on a taxi. pre book a rental car before you leave DOHA, the rent is just 100 riyals (mid size to small size car, depends on the availability) per day. so book and take the rental car from the airport and drive down to the hotel then to GP. the road is simple and if you have a GPS its great if not study the google map before your departure. thats what i did, and found to be cheap and simple... you will pay 100 riyals just for a ride from the airport to the manamma city itself on a taxi one way, so beware...
Take my advise.. what i did previously...
First DONT rely on a taxi. pre book a rental car before you leave DOHA, the rent is just 100 riyals (mid size to small size car, depends on the availability) per day. so book and take the rental car from the airport and drive down to the hotel then to GP. the road is simple and if you have a GPS its great if not study the google map before your departure. thats what i did, and found to be cheap and simple... you will pay 100 riyals just for a ride from the airport to the manamma city itself on a taxi one way, so beware...