The famous line from "The Day the Earth Stood Still" (1951) is "Klaatu barada nikto." This phrase is spoken by the protagonist, Klaatu, to a robot named Gort in order to prevent him from destroying humanity. The line has become iconic in science fiction and is often referenced in popular culture as a symbol of communication and understanding between different beings. The film explores themes of peace, the potential for humanity's self-destruction, and the importance of cooperation.

The original "The Day the Earth Stood Still" is a 1951 science fiction film directed by Robert Wise. It tells the story of an alien visitor named Klaatu who arrives on Earth with a powerful robot named Gort. Klaatu comes to deliver a warning to humanity about its destructive tendencies and the need for global peace. The film explores themes of fear, understanding, and the potential for cooperation among nations. It is considered a classic of the genre and has influenced many subsequent science fiction works.

"The Day the Earth Stood Still" (2008) is a science fiction film and a remake of the 1951 classic. It stars Keanu Reeves as Klaatu, an alien visitor aiming to save Earth from humanity's self-destructive behavior. While the film features impressive visual effects and a modern take on the original story, it received mixed reviews from critics and audiences. Many praised its themes and performances, particularly Reeves', but some felt it lacked the depth and impact of the original. Overall, opinions vary, making it worth watching for sci-fi fans.

In the movie "The Day the Earth Stood Still," Gort is a powerful robot that serves as the protector of the alien Klaatu. Gort does not stand for anything as an acronym; rather, it is simply the name given to the robot. Gort possesses advanced technology and immense strength, capable of disarming weapons and enforcing Klaatu's warnings to humanity about the dangers of violence. The character has become iconic in science fiction, symbolizing both a guardian and a potential threat depending on humanity's actions.