Gustavo de Jesús Gaviria Rivero (25 December 1946 – 11 August 1990) was a Colombian drug trafficker.
As Pablo Escobar's cousin and right-hand man, Gaviria controlled the Medellín cartel's finances and trade routes.
Though he was the owner of a fortune comparable to Escobar's and even had a military apparatus at his service, Gaviria was not as well known, as he kept a low profile.
Since Gustavo died four days after President César Gaviria took office, at the time, the media and the country in general thought the president had begun his term with an offensive against the narcoterrorists.
Gustavo's death triggered a counter-offensive by Escobar that initially destabilised administration.