According to
this site, there are no commercially available GM blueberries. Hybrids are probably not something you need to avoid. With plants like tomatoes, people may prefer to avoid hybrids, not because they pose any potential health or environmental risk, but because if you save the seeds and plant them, the plant that grows won't be identical to the parent plant. Production of hybrid seed is something that generally needs to be done on a large, commercial scale, so when you buy hybrid seeds you're supporting big business and not encouraging perpetuation of varieties people can save and pass on themselves without paying for them.
But named varieties of plants like blueberries and apples are all like hybrid tomatoes - their seeds don't grow into plants like the parent plant. People get new apple or blueberry plants by taking cuttings from existing plants - and anyone (who knows how) can do it themselves. Any variety of blueberry is one you can use to start new plants for yourself and others, so a hybrid blueberry is not a dead end in the same way a hybrid tomato is.