1. An apparatus for setting up a gateway for an AUTomotive Open System ARchitecture (AUTOSAR)-based vehicle network, comprising: a computing device, and a storage medium containing program instructions embodied therein, execution of which by the computing device causes the apparatus to provide functions of: a candidate selection unit for selecting an Electronic Control Unit (ECU) connected to at least two communication clusters, from among a plurality of ECUs, as a gateway candidate; and a gateway generation unit for generating a gateway meta-model based on instance generation input values entered by a user, the gateway meta-model including a gateway instance generated with reference to the ECU selected by the candidate selection unit, a frame mapping instance for performing mapping between frames including source Interaction layer Protocol Data Units (IPdus) and target IPdus, based on the instance generation input values, an IPdu mapping instance for establishing mapping between IPdus by mapping a source IPdu and a target IPdu contained in an identical frame to each other, and a signal mapping instance for setting up locations at which signals are to be transferred to a communication cluster of the target IPdu when the source IPdu and the target IPdu contained in the identical frame are mapped to each other.