Gelatin is pretty worthless actually. It IS a type of protein, but its biological value is basically Zero since its seriously lacking in every essential amino acid (it's an entirely incomplete protein). For post-workout nutrition, whey protein would be an even better choice than egg. Whey has a biological value higher than egg, and is the fastest absorbing type of protein there is. Many brands have added BCAA's to for muscle recovery/growth. For every gram of protein post-workout, take about 2 grams of carbohydrates with it, as carbs shuttle protein to the muscles.