Older adults experiencing homelessness face accelerated aging and complex multimorbidity, yet they often remain underserved by traditional care models that assume housing stability. Person-centred assessment approaches, including the use of an adapted Comprehensive Geriatric Assessment (CGA) template, are needed to address the unique needs of vulnerably housed populations. The Guidance document describes a framework that incorporates trauma-informed approaches and evaluates structural barriers such as medication access, nutrition, and hygiene. Implementing this adapted CGA allows interprofessional teams to distinguish medical conditions from social contributors to decline, supporting realistic, client-driven care plans that improve diagnostic clarity and reduce avoidable acute care utilization.