Greenland will become a more temperate land after the pole shift, being moved into a position equivalent to the border between Canada and the US today. The glaciers and the massive amount of ice still remaining on Greenland from its days as a former pole will melt, steadily, but will take some decades to completely melt. Meanwhile, the force of rushing water will make habitation there tenuous, but coastal settlements such as fishing villages, high above the rushing rivers and with access to the sea, will fare well.
Note Polar Flood commentary.
Note N Atlantic Melt commentary.