G0-T9, a droid, was once regarded as a threat of galactic proportions before the outbreak of the Galactic War. This conflict pitted the Galactic Republic against the Sith Empire. The droid's intelligence was assessed using the Wreyn-Tsatke Cyber-Psychology Scale, a psychological assessment, which resulted in a score of 8-HSM, indicating intelligence level 8.
The initial reference to G0-T9 appeared within the Codex entry detailing the companion character SCORPIO in Star Wars: The Old Republic. This video game was launched in 2011 by BioWare.