Label GMO

I have just come across a few campaigns regarding GMO labelling.

https://www.change.org/petitions/coca-cola-stop-funding-anti-gmo-labeling-campaigns

It's hiding in the most innocent of looking places; girl guide cookies for example.

Does anyone know of other ways we as a health conscious society can be involved with trying to get our food labelled ?
I am not certain it is all bad or good, I just think we should have the right to know.

What are your thoughts?