There is lots of help on the net for which foods to avoid and which are ok, there are also good cook books out there which would help you to avoid meals with a high glyceamic index. I was surprised which stuff is ok and which isnt. I had a high bmi at the start of my pregnancy and my midwife was very much of the 'off to the consultant with you' type, i had a gtt at 14 weeks ( the 3 hr test) and another at 28 weeks, my 28 week results were better than my 14 week ones and neither was anywhere near the levels for GD. Im now back on midwife led care and quite happy that she took the precautions to get me tested, my baby is measuring slightly big and one thing we know it isnt is GD! x