This is the summary of a report that contains an overview and concrete recommendations to take up the main findings of four UNDP pilot initiatives funded by the Republic of Korea to gather evidence about what works to integrate a "GBV lens" into broader development interventions with the aim to prevent and respond to GBV. The recommendations are practical and will help development professionals -- particularly UNDP staff with policy or programmatic responsibilities -- to assess whether a particular intervention has the conditions to integrate a "GBV lens" as part of its core development objectives. All UNDP programmes and policies encounter at some point GBV and thus should be made aware of the possibility of addressing and preventing this global scourge.