3 occurrences across the corpus

King James Version

Psalms 83:7

Gebal, and Ammon, and Amalek; the Philistines with the inhabitants of Tyre;

Ezekiel 27:9

The ancients of Gebal and the wise men thereof were in thee thy calkers: all the ships of the sea with their mariners were in thee to occupy thy merchandise.

OT Pseudepigrapha

Testament of Levi 3:1

AND when I was going to my father, I found a brazen shield; wherefore also the name of the mountain is Aspis, which is near Gebal, to the south of Abila.