I do not know what aircraft you are flying or what type of airports you are arriving. If you are flying a small private A/C to a regional airport without a tower, just turn off the runway and taxi to any unoccupied spot. If you a flying a 737 and land at KMSY in New Orleans, you must be extremely familar with the airport. Also, are you running the game with the setting high enough to show the marker signs that indicate the runways, taxi way? In the real world arena, these signs are very easy to see and are lighted at night. When my great uncle first landed a 747 at Frankfurt, he said that he was met by a truck with a sign on the bed stating " Follow Me". To my knowledge the gates are not marked in FSX. Also commercial air crews are supplied with extremely detailed maps of the airports. My pard just bid and got 15 hour non stop to India. I will ask him if he had any problems when he exited the runway.
If anyone knows all the gates and taxiways for FSX, I think they are spending way too much time flying on a PC.