The following is the results of your search for gergesa.
Gergesa: =Gerasa, identified with the modern Khersa, "over against Galilee,"
close to the lake. This was probably the scene of the miracle,
(Mark 5:1-20) etc. "From the base of the great plateau of Bashan, 2,000
feet or more overhead, the ground slopes down steeply, in places
precipitously, to the shore. And at the foot of the declivity a bold
spur runs out to the water's edge. By it the frantic swine would rush
on headlong into the lake and perish." Porter's Through Samaria.