Garayua moved to California in 2004 after being cast in the leading role in Nilo Cruz's Two Sisters and A Piano at the Old Globe Theater in San Diego.

Other notable roles include Nurse Chapel in American Housewife,[6] Madison Young in Criminal Minds,[7] Vita Chacon in Cold Case, and Gloria Ortiz in ER.

[9] Fixing Paco, in which Garayua played the lead role of Margie Fuentes, was nominated for 2013 Best Webseries in the "Drama" Category.

She has also taught “Beginning and Intermediate Drama” at the Los Angeles Unified School District's “Gifted and Talented Fine Arts Conservatory", “Adult Beginner’s Scene Study” at “The Mauricio Ochmann Studio” in North Hollywood, “Advanced On-Camera Technique” at “Actor Training in LA” in North Hollywood, and “Teen Scene Study” at the “John D’Aquino’s Acting Studio” in Toluca Lake.

In addition to her private coaching business, Gloria produced an online course for beginning actors of all ages called “Acting for True Beginners”.