Currently, my post workout shake does have some mid GI carbs, but not as much as some folks recommend. Currently, I drink a post workout protein shake with only about 20-30g carbs max. I'll add a small amount of gatorade to do this. Or sometimes I add nothing .. just protein and water. Then I hit my largest daily meal about 30 min later with extra brown rice or oats to fill back up. Over the years prior to this current contest prep, I always added 40-50g moderate GI carbs to my post workout shake. I even would add Jay Cutler's method of about 8 oz coke or sprite into my shake to get those sugars asap. But for me personally, that is too much. Yes the muscles are depleted and need glycogen, but for me, I prefer to keep my glycogen fuel coming from non-sugar sources unless I am completely fatigued to the point where I know sugar is required (a rarity).
Bulking .. red meat and more red meat. Eat those fats. Lift big and eat big. And make sure everything you eat (except your whey) comes from food sources that once lived (meats, plants, veggies, milk, cheese, etc.) The body is not made to process sugars effectively for muscle growth. And canned foods or preservative filled junk (ie chips, soups, etc) can be a diet killer and impede growth. Now thats my body talking, not necessarily proven fact. But the cleaner I ate in quantity (ie 4000 cals daily), the bigger I grew. When I added crap, my "muscle" growth stunted.
Hope that helps.