The Dug crime lord Sebolto ran a smuggling operation in this system at some point prior to the Battle of Naboo.
Sebolto's dealings in the Gazzari Minor system were leaked to the Republic Security Force by Bendix Fust, which led to Sebolto losing a huge amount of credits. In revenge, Sebolto placed a bounty on Fust's head, eventually collected by Jango Fett during The Hunt.
Montross, also taking part in The Hunt also went there because Groff Haugg lied to him in order to divert him away from the Bando Gora. However, Montross learned of Bendix Fust and what was happening on Oovo IV which managed to get him back on track.
Jason Fry confirmed that the Gazzari Minor system was invented to account for mapping discrepancies between Knight Errant and previous sources.
- The Essential Atlas