The kanji that accompanies the Gunnm title literally means "gun dream". This kanji compound would normally be read as "juu mu", but manga artist Yukito Kishiro used the English word "gun" (rendered as "gan") for the "gun" kanji. Therefore, the actual pronunciation of Gunnm is "Ganmu".
Become known as in North America as "Alita: Battle Angel", and eventually had the theatrical adaptation Alita: Battle Angel (2019).