Geography of Gozo
The geography of Gozo, is dominated by water as it is the second largest island in the Maltese archipelago and is made up out of limestone. There are several islands which fall under Gozitan jurisdiction and thus are additions to the overarching Maltese archipelago. The main island of Gozo is located  northwest of the main island of Malta. It is mostly known for its multitude of low-lying hills. The highest point in Gozo is Ta' Dbiegi hill, which falls under the San Lawrenz local council. The island of Comino, which is also the third largest island in Malta, falls under Gozo. Extreme Points of Gozo 

Lantern Point and Sultan Rock are both found on Comino. San Dimitri Point and Reqqa Point are the westernmost and northernmost points of the entirety of the Maltese islands. The lowest altitude of Gozo is obviously  above sea level as the island is surrounded by the Mediterranean Sea. Index of hills in Gozo

References 

Geography of Malta
Gozo