EGPWS is available with or without an internal GPS card. If you have an EGPWS installed with an internal GPS card, then there are 2 types available. An 8 channel GPS, which is used purely for providing a position source to the EGPWS, or a 24 channel GPS which is certified to en-route Navigation standards and which can also be used as a position source for the FMS. In fact, some B737s are using this solution today for the FMS as it provides a very cost effective alternative than installing Multi-Mode Receivers on the aircraft.