Effort is currently underway to get a truth-in-labeling initiative on the ballot for November, 2012. LabelGMOs.org is sponsoring this campaign. Its mission “is quite simply to get foods that contain GMOs (genetically modified organisms) as ingredients labeled so that we can make educated choices about the food we eat”, according to its website.
There are several ways to get involved, whether you live in California or beyond. Check out this link for ways to get involved: http://labelgmos.org/take-action/