The Opportunity Project Act of 2019 This bill directs the Department of Commerce, through collaboration between federal agency personnel, end users, and technology experts, to carry out a program, to be known as the Opportunity Project, to facilitate the development of digital products for the public. Commerce may enter into agreements with federal agencies and states or political subdivisions of states to (1) provide for participation by their employees in digital product development conducted through the project, or (2) make available employees of Commerce to assist in teaching and implementing the processes of the project for use in digital product development by such agency, state, or political subdivision. The Government Accountability Office must report on the project's effectiveness.