With the gear down the GPWS thinks the aircraft is going to land, and therefore automatically inhibits the "Terrain Terrain Pull up" warning, however if terrain closerure rate is excessive will give a "Sink Rate" warning instead.
I question i have on EGPWS, is does it include in its database the position of the runway i.e. if the aircraft is going to land short will a EGPWS give a warning of this?