Is it possible that gas turbine engines can be used for railways , even though it may posses some risk such as Foreign object damage , can it be efficient such as electric trains but it can act as stand alone system
If you mean using the exhaust thrust to push the train, I am not sure. If you mean using the power from the shaft of the turbine to derive mechanical work, it's been done: JetTrain .
Note that the gas turbine was only efficient for high speeds, and there were more traditional drive trains (diesel electric) for lower speed operations and idling.
This has been done multiple times, see Turbojet train. Only few really jet-powered trains have been built, for research in high-speed rail. Gas turbine locomotive is a less extreme attempt to use a turbine for powering the wheels (rather than moving the train with its direct thrust).