Good points ,Few C & Meto, about possible icing,given the weather almost certain,& reduced function of GPWS in ldg. configuration I was thinking of E-GPWS so you are correct on that score.Some models do still generate a warning with gear down usually "Terrain" without the pull up alert,depends on closure rate& speed.
Anyway letīs hope we do not have to wait an eternity for the official report,then we all can learn something.