To find the weight of Gabriel's pumpkin, we need to add the weight of Marcos' pumpkin (1.37 pounds) to the additional weight that Gabriel's pumpkin has over Marcos' pumpkin (0.24 pounds).
Gabriel's pumpkin weight = Marcos' pumpkin weight + additional weight Gabriel's pumpkin weight = 1.37 pounds + 0.24 pounds Gabriel's pumpkin weight = 1.61 pounds
So, Gabriel's pumpkin weighs 1.61 pounds.