Michaelkelly71 contributed to the Michaelkelly71/Acity_CPP_Project repository by first establishing a foundational C++ project skeleton, including a Hello World example to standardize structure and demonstrate basic iostream usage. This groundwork enabled consistent build practices and smoother onboarding for future contributors. Later, Michaelkelly71 developed a desktop GPA Calculator using Java Swing, implementing a graphical interface for student and course data entry, GPA computation, and local data storage. The project leveraged Java, C++, and XML, with a focus on Ant Build System and GUI development. The work addressed practical needs for student record management, though the feature set remained relatively focused and foundational.