"Hunter x Hunter: G.I Final" is a direct continuation of the "Greed Island" arc, focusing on Gon Freecss and his friends as they navigate the challenges of the Greed Island game, a highly advanced and dangerous virtual reality world. The story picks up with Gon, Killua Zoldyck, and their allies striving to complete the game's objectives, which involve collecting 100 specified cards. These cards, known as "Slot Cards," are scattered across the game's expansive and perilous environment, each requiring unique strategies and battles to obtain.

The narrative intensifies as Gon and Killua face off against the Bomber, a group of powerful and ruthless players led by Genthru, who seek to dominate the game for their own gain. Genthru's ability, "Little Flower," poses a significant threat, as it allows him to create explosive attacks that can incapacitate or kill opponents. The Bomber's interference complicates the protagonists' mission, forcing them to devise clever tactics and rely on their growing Nen abilities—a form of energy manipulation central to the series.

Key characters include Gon, whose determination and innate talent drive the group forward, and Killua, whose strategic mind and combat prowess complement Gon's strengths. Their mentor, Biscuit Krueger, plays a crucial role in training them to refine their Nen techniques, ensuring they are prepared for the escalating challenges. Other allies, such as the enigmatic Hisoka and the resourceful Tsezguerra, provide additional support, though their motivations often remain ambiguous.

The story builds toward a climactic confrontation with the Bomber, where Gon and Killua must outwit and overpower their adversaries to secure the final cards needed to complete the game. The resolution of this arc sets the stage for future developments, as the characters' experiences in Greed Island deepen their understanding of Nen and the broader world of Hunters. The narrative maintains a balance of action, strategy, and character development, staying true to the series' overarching themes of perseverance and growth.