Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Scale
GOZ_SCALE_FACTOR_IMPORT
Parameter: Color Map
GOZ_IMPORT_COLOR_MAP
Parameter: Normal Map
GOZ_IMPORT_NORMAL_MAP
Parameter: Displacement Map
GOZ_IMPORT_DISPLACEMENT_MAP
Parameter: UVs
GOZ_IMPORT_UVW
Parameter: Subdivision Surface
GOZ_IMPORT_CREASE_EDGE
Parameter: Polypaint
GOZ_IMPORT_POLYPAINT
Parameter: Polygroup
GOZ_IMPORT_POLYGROUP
Parameter: Replace Existing
GOZ_IMPORT_REPLACEEXISTING
Parameter: Target
GOZ_IMPORT_TARGET
Parameter: Scale
GOZ_SCALE_FACTOR_EXPORT
Parameter: Color Map
GOZ_EXPORT_COLOR_MAP
Parameter: Normal Map
GOZ_EXPORT_NORMAL_MAP
Parameter: Displacement Map
GOZ_EXPORT_DISPLACEMENT_MAP
Parameter: UVs
GOZ_EXPORT_UVW
Parameter: Crease Edge
GOZ_EXPORT_CREASE_EDGE
Parameter: Polypaint
GOZ_EXPORT_POLYPAINT
Parameter: Polygroup
GOZ_EXPORT_POLYGROUP
Parameter: Connect With Children
GOZ_EXPORT_CONNECTWITHCHILDREN
Parameter: Bake Materials
GOZ_EXPORT_BAKE_MATERIALS
Parameter: Width
GOZ_EXPORT_BAKEDTEXTURE_WIDTH
Parameter: Height
GOZ_EXPORT_BAKEDTEXTURE_HEIGHT
Parameter: Format
GOZ_EXPORT_BAKEDTEXTURE_FORMAT
Parameter: Depth
GOZ_EXPORT_BAKEDTEXTURE_DEPTH