Gorō Maki is a former Japanese college professor whose work becomes the intellectual foundation for understanding and ultimately stopping the unprecedented disaster that unfolds in the film. Before the events of the story, Maki was a rebellious academic who was expelled from Japan following the death of his wife from radiation-related illnesses. He subsequently found employment with an American energy firm, where he began studying mutations caused by nuclear waste that the United States had dumped into the Pacific Ocean decades earlier. During this time, he developed a theory about a prehistoric sea creature that had adapted to live on the nuclear waste on the ocean floor, consuming it as a source of sustenance. He named this hypothetical creature Gojira, a word from his home region of Odo Island that translates to incarnation of God. The American Department of Energy learned of his research and suppressed its publication, giving the creature the English name Godzilla.

Maki is a complex and tragic figure whose personality is defined by rebellion, obsession, and a profound sense of disillusionment. His expulsion from his home country and the suppression of his life's work by governmental authorities created a deep-seated bitterness. The personal tragedy of his wife's death, which he may have blamed on inadequate care from the Japanese government or the dangers of nuclear materials, served as the pivotal event that shaped his later actions. His personality is characterized by a defiant individualism, captured in the final message he left behind: I did as I pleased. Now, you do the same. This note suggests a man who, having been silenced and disregarded, ultimately chose to act on his own terms and then left the consequences for others to resolve. The organized and clean state of his yacht, the Glory-Maru, found abandoned in Tokyo Bay with his slippers neatly placed, strongly implies that he carefully planned his own disappearance, likely by suicide, just before the authorities arrived.

Maki's primary motivation appears to be forcing a confrontation with the truth that had been hidden from the world. By leaving his research where it could be found, he ensured that his knowledge about the creature would ultimately reach those who needed it. The film suggests a darker and more active motivation as well. The characters speculate that Maki may not have merely discovered Godzilla but might have deliberately unleashed it upon Japan. The timing of his disappearance and the creature's first emergence from Tokyo Bay are intrinsically linked, leading the protagonist, Rando Yaguchi, to consider the possibility that Maki engineered the entire crisis as a kind of test. The revelation that Maki had once been expelled from Japan suggests a motive for revenge, a way to expose the incompetence and paralysis of the Japanese government by subjecting it to an apocalyptic-scale disaster.

In the story, Maki serves as an unseen but pivotal catalyst. Though he is already deceased when the narrative begins, his presence is felt throughout. His abandoned yacht is discovered, and the files aboard contain the crucial blueprint for understanding Godzilla. These files include a molecular schematic of Godzilla's cellular processes that the authorities initially cannot decipher. The breakthrough comes when the schematics are folded in the style of origami, revealing that Godzilla's cells convert oxygen and water into a radioactive isotope, meaning the creature can survive anywhere those elements are present. This discovery directly enables the development of a blood coagulant designed to freeze Godzilla from the inside out, forming the basis of the plan to stop its rampage. Without Maki's prior work, the task force would have had no starting point for their scientific countermeasure.

Key relationships for Maki are largely defined by his absence. He has a significant, indirect connection to Rando Yaguchi, the Deputy Chief Cabinet Secretary who leads the response. The American envoy Kayoko Ann Patterson directs Yaguchi to Maki's files, understanding their importance. Yaguchi becomes the steward of Maki's legacy, using the abandoned research to build his team's strategy. Their relationship is that of a successor to a predecessor; Yaguchi completes the work that Maki began. Another critical relationship is with the American government, which censored his research, and the Japanese government, which he may have blamed for his wife's death and his own exile. These adversarial relationships with authority are the engine of his character, driving his decision to become a whistleblower of catastrophic proportions.

The character's development occurs almost entirely through the revelations of his past and the unfolding consequences of his actions. The arc moves from Maki being a forgotten, disgraced scientist to a figure whose foresight saves Japan. The film presents an ambiguous moral judgment on him, as the question of whether he is a savior or a vengeful terrorist is never definitively answered. Yaguchi considers the possibility that Maki intentionally unleashed Godzilla as a test, forcing Japan to confront its political and bureaucratic inadequacies. This open-ended interpretation adds a layer of depth, transforming Maki from a simple plot device into a mirror for the film's themes of national responsibility and the consequences of scientific censorship. His act of leaving the research and taking his own life is a final, deliberate transfer of agency to the next generation.

Regarding notable abilities, Maki possesses no physical powers but his scientific expertise is presented as extraordinary. He was a zoologist with deep knowledge of marine biology and mutations. His most notable ability was his unconventional and creative thinking, as demonstrated by his complex schematics that required an origami-like folding to be understood. This suggests a mind that worked in non-linear, intuitive leaps, capable of visualizing biological processes that others could not. His true legacy is his intellectual legacy: the research and the name he gave to the creature, which becomes the key to its defeat.