What is GUnit primarily used for in Guidewire?

GUnit is primarily designed for configuring and running repeatable tests of Gosu code within the Guidewire environment. It serves as a testing framework that allows developers to create unit tests for their Gosu code, ensuring that functionality works as expected and making it easier to identify and fix bugs before deployment. This quality assurance process is critical in maintaining the integrity and reliability of applications built on the Guidewire platform. By using GUnit, developers can automate the testing process, which assists in continuous integration and delivery practices common in modern software development.

The other options focus on different aspects of the Guidewire platform. While configuring user interface elements is essential for developing applications, it falls under a different set of tools and practices. Managing database queries pertains to data management within Guidewire but does not relate to the testing of code functionality. Creating user documentation is essential for helping end-users understand how to use the system but does not involve the testing of the underlying codebase. GUnit’s specific role in unit testing distinguishes it as the correct answer in this context.