The Hansa-Brandenburg G.I was a bomber aircraft used to equip the Austro-Hungarian aviation corps in World War I.

This arrangement added considerable weight to the aircraft and transmitted a lot of vibration to the airframe.

A small initial production batch of six aircraft was delivered by March 1917, but were all grounded soon thereafter and put into storage due to a contractual dispute between the manufacturer and Flars (the Imperial and Royal Aviation Arsenal).

When this was resolved, deliveries recommenced, although the size of the order was reduced, and the bombers were modified by Flars before being sent to the Divača airfield, on the Italian Front.

The G.I eventually equipped three squadrons plus a replacement unit, but reports from pilots were unfavourable, especially in comparison to the Gotha G.IV that was becoming available.