 Gallo's research focuses on the psychological aspects of cardio-metabolic disorders.She has 20 years of postdoctoral research experience focused on elucidating sociocultural factors in chronic cardio-metabolic diseases and developing and testing culturally appropriate interventions to reduce disparities in these conditions among underserved groups, especially Hispanics/Latinos.Gallo has stated that the related traits of hostility, anger, and aggressiveness have long been suggested as risk factors for coronary heart disease.