A gateway apparatus is provided, including: a storage unit storing a plurality of different filter information pieces each including an application target ECU configuration, a filter condition indicating a condition of data allowed to be transferred to the ECU and a filter version, in a manner associated with each other; a selection unit selecting, from among the plurality of different filter information pieces, a filter information piece whose application target ECU configuration corresponds to an ECU configuration of an ECU installed in the vehicle; a notification unit notifying an information processor of a filter version included in the filter information piece selected by the selection unit; and a filter processing unit judging whether or not data received from the information processor is to be transferred to the ECU installed in the vehicle in accordance with a filter condition included in the filter information piece selected by the selection unit.