It can be controlled with the proper diet, but it won't go away. Depends on how bad it is, you may need medication to control it. Has your doctor made an appt. to discuss with you? Usually they'll set you up with a nutritionist to discuss ways to control it with diet. I didn't have it with my first, but I go next week for my test, pretty nervous! Babies tend to be bigger with gestational diabetes, I would make sure you ask your doctor all the questions you have about it.