Georgia Computes! ("GaComputes") was a six-year (2006-2012) project to improve computing education across the state of Georgia in the United States, funded by the National Science Foundation. The goal of GaComputes was to broaden participation in computing and especially to engage more members of underrepresented groups which includes women, African Americans, and Hispanics. GaComputes' interventions were multi-faceted and broad: summer camps and after-school/weekend programs for 4th-12th grade students, professional development for secondary teachers, and professional development for post-secondary instructors faculty. All of the efforts were carefully evaluated by an external team (led by the third and fourth authors), which provides us with an unusually detailed view into a computing education intervention across a region (about 59K square miles, about 9.9 million residents). Our dataset includes evaluations from over 2,000 students who attended after-school or weekend workshops, over 500 secondary school teachers who attended professional development, 120 post-secondary teachers who attended professional development, and over 2,000 students who attended a summer day (non-residential) camp. GaComputes evaluations provide insight into details of interventions and into influences on student motivation and learning. In this article, we describe the results of these evaluations and describe how GaComputes broadened participation in computing in Georgia through both direct interventions and indirect support of other projects.