Answer:
GOF refers to the gang of four pattern that are generally consider the basic for all the other patterns. Design pattern are basically provide the solution to the software design to resolve all problems that are associated with the development of real world applications.
GOF Design pattern implemented the parts of the re-usable object oriented software applications. The main aim of design pattern is to pass all the structural design pattern. Design pattern is the most powerful and helpful tool for the software developer and architecture.