VPN Gateway is an Internet-based service that establishes a safe and reliable connection using a VPN tunnel. You can use VPN Gateway to connect two VPCs quickly.
You can deploy VPN gateways so that the two VPCs can communicate with each other. First create a VPN gateway and a user gateway for each VPC, and then create a VPN connection to establish a VPN tunnel, and finally add a custom route entry in both VPCs. For more information, see Create a VPC-to-VPC connection.