Kosto Maggio lived his life during the era of the Galactic Civil War. During the time of the Battle of Yavin, Maggio was participating in illegal schemes with the White Thranta Shipping Company, which served as a front for the unlawful operations of Jabba the Hutt's criminal organization. Brok Ziam had Maggio's comlink number listed in his directory for the White Thranta's communication system within their secret bunker.
The character Kosto Maggio appeared in the 2003 video game Star Wars Galaxies. This massively multiplayer online roleplaying game was created by Sony Online Entertainment and distributed by LucasArts, before the game shut down on December 15, 2011. Kosto Maggio was incorporated into the game through the "Legacy Quest" update, coinciding with the release of "Publish 25," also known as the "New Game Enhancements," which went live on November 15, 2005.