Supplements are not necessary, but they can't hurt. Something like protein powder I don't even think of it as a supplement anymore (only take it after I workout).
Oh and not sure of "gomad" is literally a gallon a day, but I assure you, if I drank a gallon of milk a day, I'd be losing weight.....
I use to be super strict with my diet, but counting calories and grams of protein is a pain. Just try eat clean and healthy, along with moderation and that should go a long way.