GM crops are commonplace in the developed world. Across the USA, they account for more than 80% of all maize, 86% of cotton, and 92% of the soya bean crop grown (according to the US Department of Agriculture, 2008). In the EU, a handful of species have been approved for sale, although, in practice, almost no permission has been granted yet.
GM crops are likely to become commonplace in the EU within the next few decades. There is debate about what specifically will trigger GM to pass the political threshold that currently motivates opposition to this biotechnology. I think acceptance will probably happen when food prices rise beyond what the general public will accept. This may be a result of climate change or increased population and demand.