The sweary Hell's Kitchen TV star is said to have arrived on a Jetstar flight from Auckland, where he had earlier shared an adventure on a Lime scooter with his 5.7 million Instagram followers.
Scottish-born Ramsay, whose restaurants have been awarded a total of 16 Michelin stars, mentored MasterChef NZ's Emett, who earned his own Michelin star as head chef at Ramsay's historic Savoy Grill, London.
He worked for about 12 years for Ramsay's restaurants in London, New York and Melbourne, but told Stuff in 2014 Ramsay had sacked him after Maze in Melbourne struggled.
Emett co-owns Queenstown's Rata, and Madam Woo, and Hawker & Roll restaurants, with local Fleur Caulton.
Ramsay reportedly praised chef Sid Sahrawat
in Auckland's Cassia restaurant, posting a picture of his tuna, and yuzu dish on his Instagram story, labelling it ''delicious''.
Ramsay this week featured on Hot Ones - a YouTube channel which interviews celebrities while they work their way through a platter of increasingly spicy chicken wings.
He is yet to post on social media about his Queenstown trip.