GMO food is good or bad?

Yes, I left the question intact as asked. It demonstrates the intellect of those fearing "genetically modified" food.
Now hear this: IT'S ALL GENETICALLY MODIFIED.
Seriously, unless you found a source for ancient primordial ooze, all of your fruit, vegetables, grains and meat is genetically modified. ALL of it. No exceptions. So it has been for all of known time.
Successive generations of all cellular life-forms bear genetic modification from the "original" design. When this happens on its own the result either thrives or dies, depending on its suitability for this world. When this happens by deliberate intervention the result either thrives or dies, depending on its suitability for this world. I'm having trouble appreciating the scary difference there.
Relax. Your bread might have a slightly different vitamin and mineral content but it won't turn you into a mutant monster. The modified genes in the wheat WILL NOT meld with your cells turning you into a grass-man hybrid. I promise.