Born in Rosario, Santa Fe, Argentina, Gisel's destiny with music began at the tender age of just 7 years, when she received her first toy piano. Shortly thereafter, she started taking piano lessons and by the age of 10, she made her first home recorded album and named it "BlueBay".

Gisel's love for the arts continued as she participated in school plays, musicals, and dance. Through all her interests, she had no idea how strong her love for singing would be until one evening when she went to a Karaoke bar with her friends. She was extremely shy and nervous that evening, as Gisel’s friends convinced her to get up on the stage and sing a song. After gathering enough nerve to sing "Hero" by Mariah Careyalmost instantly, the crowd went quietas if they were hypnotized by this unknown local singer! Soon, they all began to applaud and cheer Gisel's performance and it was at that moment, she realized that singing was the thing she was destined to do...it was the connection with the people in the Karaoke bar that evening that made her realize it was the most important moment of her life. At that moment, Gisel realized the first and greatest love in her life – singing for people!
She continued performing in plays and musicals while studying hip-hop and Persian dance, and modeling on the runway for the international store, Falabella, and the clothes designer, Solido Inc. At 18, Gisel composed and recorded her first demo and was soon invited to sing on several local television stations.

As Gisel’s journey with singing continued, she traveled to Buenos Aires to work with Laura Miller, Pimpinela, and Patricia Sosa producers. She also recorded with producer Fabian Gallardo and received proposals from the manager of Karina Mazzocco, Horacio Cabak, and Manuel Wirtz.

In 2003, after winning “The Bachelorette”, the Warner Channel flew Gisel to Jamaica, where she performed at the "Grande Sport Villa Golf Resort & Spa by Beaches."

Soon after, she entered and won a singing and songwriting competition sponsored by "With you in Hollywood", a Warner Channel production. Winning the contest afforded her the opportunity to travel to Hollywood in 2004, where she performed in the “City of Angels."

In August 2004, Gisel joined a local Rock & Roll band known as "The Spanglish Band" as the lead female vocal singer. They performed in well-known clubs, restaurants, and events, such as Mei, Taura, Moore, SOHO and Costello. Concurrently, Gisel performed at the Hard Rock Café in Buenos Aires, as well as various events and restaurants in her home town of Rosario and neighboring communities.
In 2008, she performed in a key political event that was attended by more than 5,000 VIP persons, including, Nobel Prize laureate Mario Vargas Llosa, to whom she had the honor of singing "Happy Birthday" a capella. A large number of Ex-Presidents, such as Jose Maria Aznar (Spain), Alberto Lacalle (Uruguay), Vicente Fox (Mexico), and several other national politicians and experts such as Mauricio Rojas (Member of the Sweden Parliament) and Pedro Schwatz (Spanish Economist), among others, were in attendance.

Gisel's ambitions didn't stop in Argentina. On March 22, 2007, she joined SellaBand.com and was soon recognized as their most ambitious and unsigned South American Artist. She was intrigued by the friendships and bonds the artists on SellaBand forged with the people who "believed" in the artists through their purchases of "parts". The opportunity of creating something together with believers was the driving force in what ultimately became the fastest "Final Countdown" in SellaBand history! Over the course of just a few days, Gisel de Marco raised approximately $14,000 to become the 25th artist to raise $50,000 on SellaBand.com. An amazing achievement for anyone. Gisel's hard work paid off as her friends, fans, and believers launched her into the next chapter of her life...a recording deal for her debut album, “All The Way”, which released World-wide on August 1, 2010.

SellaBand was important in so many ways to Gisel de Marcothe site gave her World-wide exposure and demonstrated that she is a hit in countries around the world. Gisel expressed her gratitude by writing a song and dedicating it to her believersit’s called, “I found you”. Since the release of her debut album, "All The Way", she has been selling and shipping Limited Edition copies to people in countries throughout the world.

Gisel de Marco is living in Switzerland.