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With the introduction of limits for particle numbers besides particle mass emitted by light duty vehicles new pollution control devices like catalyzed gasoline particulate filters (GPF) might be required. GPFs need to address the challenge to provide sufficient particle number reduction at acceptable pressure drop in addition while having high conversion efficiencies for regulated pollutants. The emission performance of gasoline particulate filters coated with a three-way functional washcoat was examined. The impact of the washcoat on particle filtration efficiency was investigated, as well as its impact on the conversion efficiencies for hydrocarbons, carbon monoxide and nitrous oxides. Moreover, it was found that the precious metal containing washcoat accelerates the regeneration of a filter when loaded with artificial soot.