The film opens in Yugoslavia with the Petrovic family watching their son Stepjan winning a soccer game. Their other son Andy works on his farm, and can't play soccer at all, after falling into the well by accident. One day, Andy discovers Gus can kick a soccer ball long distances when Andy shouts, "Oyage!". Meanwhile, in Los Angeles, the California Atoms are a professional football team owned by Hank Cooper and coached by the inept Coach Venner. They are the worst team in the league and have not won a game in years. Cooper also owes a lot of money to two mobster bookmakers named Charles Gwynn and Cal Wilson. When Cooper tells them he cannot pay his debts, the bookies give him a last chance bet: if the Atoms win the upcoming Super Bowl, all gambling debts will be forgiven, but if they do not win, Gwynn and Wilson will take ownership of the team. Desperate to draw in fans, Cooper looks for a great half time show. His secretary, Debbie, sees a story in her parents' Yugoslavian newspaper about Gus. Debbie flies to Yugoslavia and hires Gus and Andy. After Gus is a hit in his first halftime show, Cooper and Venner decide to put him in the game as a place kicker. The other team protests, but as the rule book does not require a player to be human, Cooper allow Gus to kick, And able to kick a field goal from anywhere in the field, the Atoms win. The Atoms go on to win their next few games thanks to Gus, and move to first place in their division. The only catch is that Gus will only kick when Andy holds the ball and shouts the command. Debbie is assigned to watch over Andy and Gus, since she can speak Serbian. A romance begins between them, aided by Gus. Gwynn and Wilson, realizing their deal with Cooper is backfiring, hire two incompetent criminals named Crankcase and Spinner to stop Gus from playing and make the team lose. Through their schemes, Crankcase and Spinner cause the Atoms to lose two games. Despite the losses, the Atoms make the playoffs. Andy becomes a celebrity, but his parents remain unimpressed, saying he only holds the ball for Gus. Before the playoff game, Spinner convinces Andy that Debbie has been injured in a car accident. When Andy arrives at the hospital, Crankcase locks him up. Without Andy, Gus refuses to kick, and the Atoms fall behind. In the final quarter, Debbie dresses up in Andy's uniform and convinces Gus to kick a field goal, scoring the winning points. Andy, who managed to escape, arrives after the game is over. He tells Debbie his father is right: Andy is nothing, and anyone can hold the ball for Gus. With the Atoms headed to the Super Bowl, Spinner and Crankcase steal Gus and replace him with an ordinary mule. Spinner and Crankcase check into a local hotel and lock up Gus with them and Gus breaks the TV and the hotel room door. At the Super Bowl, Andy quickly realizes the mule he has is not Gus, and he and Cooper leave by helicopter to search for Gus. When the two criminals watch the game on TV, Gus goes wild and escapes. In a long comic sequence, Crankcase and Spinner chase Gus into a local supermarket where they unsuccessfully attempt to recapture the mule. The criminals make a huge mess in the supermarket, including a bag of flour, stepping on bottles of Ketchup and Mustard, making a mess of themselves, destroying dinnerware on display, getting in the way of a strong man who beats one of them up, landing in a basket of balls for the children, one of them fell into a live lobster tank, and finally, attempting to ride Gus, who throws one of them into a huge ready made cake, destroying it completely. Running from the supermarket, Spinner and Crankcase are apprehended for mule napping and for causing an extended amount of damages in the supermarket. Gus is spotted from the air by Andy and Cooper. They airlift Gus to the Super Bowl and arrive in the fourth quarter. With Gus back in the game, the Atoms make a comeback. With 3 seconds left on the clock, the Atoms are down 16–15 with the ball on their own 5-yard line. Gus lines up for a field goal attempt, but slips in the mud and misses the football. In the scramble for the ball, Gus knocks it over to Andy, who runs 95 yards for the touchdown. Andy and team walk off the field to celebrate their win.
This is the only one of their five films together where Don Knotts and Tim Conway do not share any scenes. Johnny Unitas appears as a commentator with Bob Crane supplying the play-by-play during the football broadcasts. Dick Enberg did the play-by-play for the local games. The name "Hank Cooper" was used in the 1997 Disney film The Love Bug as the name of the mechanic who meets Herbie. In Herbie Goes Bananas, a partygoer wearing an Atoms jersey is briefly seen during a masquerade ball scene. Gus would be the final feature film for Bob Crane as well as the last film in the promising, yet short career of then 20-year-old Grimes, who retired from acting after this film. This was also the final film appearance of Virginia O'Brien.
Reception
gave the film two stars out of four and wrote, "Two different kinds of movies have been coming out of the Walt Disney organization in the last few years: Inventive, entertaining fantasies like Escape to Witch Mountain and The Island at the Top of the World, and dreary retreads of tired old Disney formulas. 'Gus,' alas, is in the retread category." Richard Eder of The New York Times called it "a decently average Disney film, with a few funny parts and other parts where you would agree to smile if you could. Where the movie tries the hardest, it fails the most, as in a terribly long and trite comedy sequence in a supermarket." Joseph McBride of Variety called it "a pleasant family comedy" that "has the amiable spirit of a tall tale or kiddie story book, and while the plot mechanics are largely predictable, the cast keeps the ball in the air over the 96-minute running time." Linda Gross of the Los Angeles Times described it as "a funny and loveable, though familiar Disney live-action fantasy film for football families." Gary Arnold of The Washington Post found the film's pace "sluggish" and added, "After a while it becomes impossible to share the kids' glee in the sort of pratfall you can see coming 10 seconds in advance." He conceded, however, that "there's no point in denying or fighting the kick children get out of even mediocre slapstick."
In other media
Video games
Gus can be summoned as a mount in Disney Infinity 2.0 and Disney Infinity 3.0 via power disc. Gus will kick footballs as his attack.
