Write SQL query to solve given problem: What is the highest price of the dish "Chicken gumbo" on a menu page?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.price FROM Dish AS T1 INNER JOIN MenuItem AS T2 ON T1.id = T2.dish_id WHERE T1.name = 'Chicken gumbo' ORDER BY T2.price DESC LIMIT 1