Writer Candace Bushnell made the comment in a recent interview, saying that Gomez would be her pick for a young version of the role made famous on screen by Kristin Davis.
Gomez told Digital Spy: "That was a compliment and I was very surprised when I heard that - it was very sweet, but there is nothing official and I've never even been approached or anything."
As for whether she is a fan of the HBO series and spinoff movies, the 18-year-old said: "My mum is more of a fan because I wasn't really allowed to watch it when I was younger but I definitely love the series."
Sex and the City wrapped after six seasons on HBO in 2004. It has since spawned two big screen movies, Sex and the City and Sex and the City 2.
Plans for the continuance of the franchise, which starred Sarah Jessica Parker, have yet to be confirmed, although Bushnell told the Daily Caller that she expects there to be a future for the characters: "Definitely something on the screen. Big or small screen."
Wizards of Waverly Place star Gomez was in London to celebrate the launch of Disney Channel HD with a special showcase.
Her set will be aired on Disney Pop Stop later this year.
Gomez is currently promoting third studio album When The Sun Goes Down and her romantic comedy Monte Carlo, which opened in the US last week and hits screens in the UK in August.
Watch Selena Gomez & The Scene's video for 'Who Says' below: