Gladys made her acting debut in 1959 with Arthur Azevedo's play "O Mambembe" at the Municipal Theater of Rio de Janeiro.
She earned recognition in the theater world by appearing topless in the publicity poster for the play "O Chão dos Penitentes".
She made her theatrical debut in 1959 with Arthur Azevedo's play "O Mambembe" at the Municipal Theater of Rio de Janeiro, performing alongside Fernanda Montenegro, Fernando Torres, Sérgio Britto and Ítalo Rossi.
In 1973, Gladys met american artist Lee Jaffe in London, and forty years later, it was revealed that he was the father of Rachel.
On television, she appeared in significant productions like "Brilhante", "Bandidos da Falange", "As Noivas de Copacabana", "Hilda Furacão", "Um Anjo Caiu do Céu", "A Lua Me Disse" and "Aquele Beijo".