I've gained 80lbs since high school. Increasing protein grams did nothing. Eat more calories. Eat 3000 every day, if you don't gain weight then eat 3500, if you don't gain weight eat 4000, then 4500,5000,5500, etc.
Eat 5 meals a day with 30-50 grams of protein per meal and the rest of the calories from traditional bodybuilding food to minimize fat gain. I've eaten 4500 calories a day of clean food, so no bs about how it's impossible.
If you think you need more than 50grams of protein per meal, add it, but remember that the calories is the most important.