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A growing body of literature has documented an increased risk of gender-based violence (GBV) within the context of COVID-19 and service providers' reduced capacity to address this vulnerability. Less examined are the system-level impacts of the pandemic on the GBV sector in low- and middle-income countries. Drawing on the perspectives of 18 service providers working across various GBV-related sectors in Guatemala, we explored how the Guatemalan GBV prevention and response system operated during the COVID-19 pandemic. Findings highlight that the pandemic reinforced survivors' existing adversities (inadequate transportation access, food insecurity, digital divides), which subsequently reduced access to reporting, justice, and support. Consequently, the GBV prevention and response system had to absorb the responsibility of securing survivors' essential social determinants of health, further limiting already inflexible budgets. The pandemic also imposed new challenges, such as service gridlocks, that negatively affected survivors' system navigation and impaired service providers' abilities to efficiently receive reports and mobilize harm reduction and prevention programming. The findings underscore the systemic challenges faced by GBV service providers and the need to incorporate gender mainstreaming across public service sectors-namely, transportation and information/communication-to improve lifesaving GBV service delivery for Guatemalan survivors, particularly survivors in rural/remote regions.