Garmin G1000 have some limitation:
NOTE: Terrain data is not displayed when the aircraft latitude is greater than 75 degrees north or 60 degrees south
Garmin G3000 has less limitation:
NOTE: Terrain and obstacle alerting is not available north of 89º North latitude
and south of 89º South latitude. This is due to limitations present within the Terrain
database and the system’s ability to process the data representing the affected areas.
But in game we can remove limitation isnt it? Or Asobo can perfect simulation only for limitation? =)