GEBAL was a seaport and district of Phoenicia, and was situated north of Beyrout. It was called Byblos by the Greeks; but its old scriptural name has been partially revived by the modern Arabs who call it Jebail. It was a place of importance in ancient times (Ezek. 27:9), and the seat of the worship of Thammuz, a Syrian idol generally supposed to be the same as the Phoenician Adonis, and perhaps the Egyptian Osiris. The district of Gebal and all Lebanon were assigned to the Hebrews, but were never fully possessed. (Josh. 13:5) - Ancient Geography
Byblos in Wikipedia
The Phoenician city of Gebal was named Byblos by the Greeks, because it was through Gebal that papyrus Bύβλος (bublos; Egyptian papyrus) was imported into Greece. Hence the English word Bible is derived from byblos as "the (papyrus) book." The present day city is now known by the Arabic name Jubayl or Jbeil (جبيل), a direct descendant of the Canaanite name. Byblos (Greek) or Gebal (Phoenician) is located on the Mediterranean coast of present-day Lebanon, about 26 miles (42 kilometers) north of Beirut.
It is mentioned in the Bible in 1 Kings 5:18, referring to the nationality of the builders of Solomon's Temple, and also in Ezekiel 27:9, referring to the riches of Tyre.
Gebal in Easton's Bible Dictionary
a line (or natural boundary, as a mountain range). (1.) A tract
in the land of Edom south of the Dead Sea (Ps. 83:7); now called
(2.) A Phoenician city, not far from the sea coast, to the
north of Beyrout (Ezek. 27:9); called by the Greeks Byblos. Now
Jibeil. Mentioned in the Amarna tablets.
An important Phoenician text, referring to the temple of
Baalath, on a monument of Yehu-melek, its king (probably B.C.
600), has been discovered.