GMO TIMELINE: A HISTORY OF GENETICALLY MODIFIED FOODS GMO Timeline: A History of Genetically Modified Foods released in 1980 late '90s when GM crops became widespread The Flavr Savr tomato first genetically modified foods GMOinside.org Flavr Savr Tomato occurred in the 1980s didn’t hit store shelves late '90s when GM crops became widespread a few folks GMO Inside GMOinside.org, GMO Timeline 1994 the Flavr Savr late '90s when GM crops became widespread GMO Timeline: A History of Genetically Modified Foods! GMO Timeline GMOs hit the market in 1994