[2] A communicator and television pioneer in Chile, Velasco was known most during the early days of television broadcasts, becoming a prominent host with over twenty programs ranging from variety shows to news hosting, weather presenting, and renowned children's programs.

Velasco was the first woman to host the inaugural televised transmission of the Viña del Mar International Song Festival in 1972.

Gabriela de la Concepción Velasco Vergara was the third child of Raúl Velasco García, a member and founder of Los Cuatro Huasos, and Gabriela Vergara Polloni.

[3][4] She began her television career after being recruited by Canal 13 in 1965, when she accompanied her sister to an audition for the program Esto es Chile.

In partnership with Alicia Puccio [es] and her children's singing group, Velasco released an album titled Feliz en tu Día for the soundtrack of her television program, which was finally released on August 3, 1979.