The Gender-Transformative Accelerator (GTA) tool is a process-oriented rapid analysis and action planning tool for implementers, advocates and technical staff working on initiatives to end female genital mutilation. The tool was initially designed for the UNFPA-UNICEF Global Programme to End Child Marriage (the Global Programme) and is centred within the Global Programme’s definitions and core elements of gender-transformative programming, but has been adapted for the UNFPA-UNICEF Joint Programme on the Elimination of Female Genital Mutilation and aligned with the Joint Programme theory of change and programme framework.