While filming on location in Veracruz, Mexico, Mel Gibson learned that an elderly Mexican extra was suffering from cancer. Gibson got the man a visa by writing to the American ambassador, and then personally arranged for him to be flown to an alternative cancer therapist in Arizona.
After Driver (Gibson) is released from El Pueblito by Javi, in order to kill Frank, he is tailed by two hitmen on the way to San Diego. Hitman number one (Mark) is played by William Gibson, Mel's son. Hitman number two (Jesse) is played by Owen Dunne, Mel's nephew.
According to the "Making of Get the Gringo" featurette, Mel Gibson had originally contacted Steve Jobs to play a part in the film. Steve showed initial enthusiasm, but eventually declined the offer, citing that he wasn't much of an actor. Gibson then resorted to the hilarious Clint Eastwood impression.
While filming the border scene, Mel Gibson and Mario Zaragoza were about to start a fist fight. Production Crew stopped it.
Has the title "How I Spent My Summer Vacation" in the UK.