It is better you refer Cengage Series for Calculus, I am suggesting this book because, it is a book which doesn't want to fulfill by giving 100's of standard problems, but it wants to provide neatly described theory why will make our fundamentals very strong.
And if you are preparing for Gate. I feel the exercise given at the end is not necessary as these questions are prepared to meet the difficulty of IIT JEE (Jee Advanced). So the theory part and examples would be quite enough