Alot depends on whether you're on insulin during pregnancy.
I've had GD with both of mine, the first time I was on insulin and the second time it was easily controlled with diet.

When my first bub was born I had regular finger pr!cks during labour (my labour was pretty long), and she was taken to special care for observation about an hour after birth. While she was there they did heel pr!cks on her every 4 hours. She was fine and I was none to happy about the separation and heel pr!cking for no other reason than "hospital policy" and so was determined to get around it with my second baby.

Luckily I wasn't on insulin with him which made things much easier. He was never heel pr!cked, did not go to special care and was with me from birth, there was no separation at all. But before he was born I had discussions with the hospital about what had happened with my daughter and they said they'd put her in special care for a combination of reasons - GD, long labour, and the fact I'd developed a fever towards the end of labour (hardly surprising since I'd been awake 36 hours and hadn't eaten...honestly you have to wonder sometimes...)

During labour you'll probably find that the GD will cause them to take a more interventionist approach to your labour - BSL checks, fetal monitoring, they'll be more paranoid about infection so they'll want to take your temp alot, they'll also probably want an IV in ...it tends to get trotted out as the excuse for everything under the sun. So if you're looking for a low intervention labour it might be wise to think about what you want in this area as well.