GDPD5 (Glycerophosphodiester Phosphodiesterase Domain Containing 5) is a gene involved in lipid metabolism, specifically in breaking down glycerophosphodiesters into glycerol phosphate and alcohol. This function supports the turnover of membrane components and regulates intracellular signaling. GDPD5 plays a role in lipid signaling pathways, with potential implications for metabolic and cardiovascular health.