It's true that many libertarians (small 'l') are in favour of capitalism, technology and genetically modified food, but as a political party Libertarianz (big 'l' and an 'NZ' on the end) is neither for nor against GE. What Libertarianz is for is laws protecting against force and fraud. What we are against is busybody politicians inflicting force and fraud on us. In this respect, under 'Force and Fraud' and 'Busybody Politicians' please see 'The GE Debate,' particularly under Fitzsimplesimons, Jeanette and Hager, Nicky.
The Libertarianz position is that the issue of GE food is not one for politicians who know nothing - who should butt out - but for scientists, consumers, farmers, manufacturers and the like; the only political issue is a legal one, that there should be laws that protect against fraudulent labelling and objectively proven damages. I answered the particular question about legal protection some years ago here, and gave a speech to students on the subject some more years ago here. (Dates have been changed on the hosting site for some reason; these two were delivered some three to five years ago as I recall.)
The Royal Commission made a similar point in its report when discussing common law. In fact, the Royal Commission went much further than this:
"Technology is integral to the advancement of the world [they said]. Fire, the wheel, steam power, electricity, radio transmission, air and space travel, nuclear power, the microchip, DNA: the human race has ever been on the cusp of innovation. Currently, biotechnology is the new frontier. Continuation of research is critical to New Zealand's future."
Not my words, or those of Ayn Rand, but those of the Royal Commission on Genetic Modification, which I would be proud to have written. The Commission adds, "As in the past we should go forward but with care." And as Lindsay Perigo clarified at the time: "The only "care" that needs to be exercised here is that at no stage are the rights to life, liberty & property violated. Otherwise, I say to the geneticists, tamper away - from your work will come more & better food, new medicines, & the unlocking of more of life's secrets. I hope you make bucket-loads of money from it."