Thousands of colonies are moved into N.Y. every year and provide a valuable service to N.Y. farmers and consumers. Sadly, bees and beekeepers have had a rough time recently. We must contend with 3 exotic pests introduced over the past 15 years. There also has been a resurgence of American Foulbrood, which had been successfully controlled by antibiotics in the past. I've tried to answer this question by searching for publicly available research on the subject and by drawing on my own knowledge of honeybee biology.
Honeybees collect and consume nectar and pollen.
Nectar is a complex sugar solution which provides carbohydrates. There is very little protein from forage plants in nectar. Since GM plants generally express their special characteristics in the form of biologically active proteins, there is probably not much danger to bees from nectar. It may also contain novel proteins produced by the modified plant. Pollen is the male fertilizing component of flowering plants and so is a concentrated source of genetic material.