It all depends on your blend and how you're consuming it. There are certain blends we make specifically for people who are trying to gain weight. Those blends intentionally have more carbs and calories in them than some of the other blends we offer.
On the other end of the spectrum, we also create protein powder blends with ingredients that support weight loss goals. However, the timing and quantity of protein consumption are just as important as the ingredients.
At the end of the day, weight loss and weight gain are all about caloric intake. If you have too many servings of protein powder per day, your overall calorie consumption might go up, which can in turn cause you to gain weight. If you're looking to maintain or lose weight, stick to the recommended daily serving for your blend.
Most importantly, your weight depends primarily on the quantity and quality of the whole foods you eat throughout the day alongside your Gainful protein.