Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Scale
GOZ_SCALE_FACTOR_IMPORTParameter: Color Map
GOZ_IMPORT_COLOR_MAPParameter: Normal Map
GOZ_IMPORT_NORMAL_MAPParameter: Displacement Map
GOZ_IMPORT_DISPLACEMENT_MAPParameter: UVs
GOZ_IMPORT_UVWParameter: Subdivision Surface
GOZ_IMPORT_CREASE_EDGEParameter: Polypaint
GOZ_IMPORT_POLYPAINTParameter: Polygroup
GOZ_IMPORT_POLYGROUPParameter: Replace Existing
GOZ_IMPORT_REPLACEEXISTINGParameter: Target
GOZ_IMPORT_TARGETParameter: Scale
GOZ_SCALE_FACTOR_EXPORTParameter: Color Map
GOZ_EXPORT_COLOR_MAPParameter: Normal Map
GOZ_EXPORT_NORMAL_MAPParameter: Displacement Map
GOZ_EXPORT_DISPLACEMENT_MAPParameter: UVs
GOZ_EXPORT_UVWParameter: Crease Edge
GOZ_EXPORT_CREASE_EDGEParameter: Polypaint
GOZ_EXPORT_POLYPAINTParameter: Polygroup
GOZ_EXPORT_POLYGROUPParameter: Connect With Children
GOZ_EXPORT_CONNECTWITHCHILDRENParameter: Bake Materials
GOZ_EXPORT_BAKE_MATERIALSParameter: Width
GOZ_EXPORT_BAKEDTEXTURE_WIDTHParameter: Height
GOZ_EXPORT_BAKEDTEXTURE_HEIGHTParameter: Format
GOZ_EXPORT_BAKEDTEXTURE_FORMATParameter: Depth
GOZ_EXPORT_BAKEDTEXTURE_DEPTH