You're missing the point more essentially: What's "GMO"?
Is selective breeding "GMO"? Is splicing a branch onto a tree "GMO"? Hell, if you deliberately select one cow to breed with that bull, you're 'managing' natural selection, and thus is that GMO?
Is using that bull's semen in another artificially inseminated cow "GMO"?
Every piece of corn you eat - from the cob at KFC to something grown entirely organically by the hippies next door, is "genetically modified' because they are not even *close* to the original strain of corn. Same with wheat, apples, oranges, everything of food value has been 'managed', bred, cross pollinated, or selected for traits - is that GMO?
Does it have to be done with a microscope?
If I develop a new herbicide, spray it on a field of grain, and then pull out the plants that survive, use their seeds to grow a new crop, and do the same things a few times to develop herbicide-resistant seeds, are those "GMO"?
I just find the entire subject farcical because you can't get two activists to agree even on what "GMO" means - just that it's evil, whatever the definition.