There is no generalized answer. I myself follow the AD and only take in around 30g of carbs a day and still grow no problem. Thats the nature of the AD. If your following a more traditional diet then I would eat a decent amount of carbs when trying to put on size.
I honestly think though that people put too much thought into the micronutrient breakdown when trying to gain size. Get enough protein,make sure your getting your EFAs after that eat lots of good nuritious food and judge your progress. If your not gaining,eat more. If you feel like your gaining too much fat,toss in a little cardio.