Gender-based violence (GBV) is a significant public health issue in Nairobi’s slums, contributing to high mortality rates. A mixed-methods approach combining quantitative data analysis from service utilization surveys with qualitative insights from focus group discussions and interviews. The proportion of women who accessed GBV prevention services increased by 25% over the year, yet only 30% reported feeling fully supported in their use of these services. Existing GBV prevention services are effective but require enhanced support to increase user satisfaction and effectiveness. Develop a comprehensive referral system linking services with community resources and allocate additional funding for service enhancement.