Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Reference
GV_OBJECT_OBJECT_ID
Parameter: Reference Mode
GV_OBJECT_PATH_TYPE
Parameter: Start Position
GV_OBJECT_START_TYPE_ID
Parameter: Start Distance
GV_OBJECT_DISTANCE_ID
Parameter: History Depth
GV_OBJECT_HISTORY_DEPTH_ID
Parameter: Path
GV_OBJECT_PATH_ID
Parameter: Local Matrix
GV_OBJECT_OPERATOR_LOCAL_IN
Parameter: Global Matrix
GV_OBJECT_OPERATOR_GLOBAL_IN
Parameter: History level
GV_OBJECT_OPERATOR_HISTORY_IN
Parameter: On
GV_OBJECT_OPERATOR_ON
Parameter: Local Matrix
GV_OBJECT_OPERATOR_LOCAL_OUT
Parameter: Global Matrix
GV_OBJECT_OPERATOR_GLOBAL_OUT
Parameter: Previous position
GV_OBJECT_OPERATOR_OLD_POS_OUT
Parameter: Previous rotation
GV_OBJECT_OPERATOR_OLD_ROT_OUT
Parameter: Previous scale
GV_OBJECT_OPERATOR_OLD_SIZE_OUT
Parameter: Previous global matrix
GV_OBJECT_OPERATOR_OLD_GLOBAL_OUT
Parameter: Previous local matrix
GV_OBJECT_OPERATOR_OLD_LOCAL_OUT
Parameter: Position velocity
GV_OBJECT_OPERATOR_VELOCITY_POS_OUT
Parameter: Rotation velocity
GV_OBJECT_OPERATOR_VELOCITY_ROT_OUT
Parameter: Scale velocity
GV_OBJECT_OPERATOR_VELOCITY_SIZE_OUT