After two years on the faculty of the Department of Forestry and Wildlife, UMass Amherst, Gabriel moved to the Population Dynamics Branch as a statistician. In that capacity, she has worked on assessments of bluefin tuna, Antarctic notothenids and icefish, and Kemps Ridley sea turtles as well as summer flounder, winter flounder, yellowtail flounder, and scup. Her research has included groundfish community structure, technological interactions, and biological reference points (including spawning stock biomass per recruit analysis). She has worked on a number of international stock assessment and methodology working groups with the Commission for the Conservation of Antarctic Living Marine Resources, and the International Commission for the Exploration of the Sea; and was the US representative to the former ICES Advisory Committee on Fishery Management. She then led the new Fisheries and Ecosystems Monitoring and Analysis Division through the modernization of fishery-independent survey data collection processes and gear instrumentation; and the expansion of the fisheries observer program to meet new court-ordered and regulatory requirements.