Connecting AWS and GCP with IPSec VPN

Constitution

Prepare Virtual Private Gateways on the AWS side and VPN Gateway on the GCP side, and connect them with IPsec VPN.

The GCP document states that it can be connected to AWS. (English version)
https://cloud.google.com/vpn/docs/concepts/overview

A gateway that is connected to a Cloud VPN gateway. A peer VPN gateway can be one of the following:

• Another Cloud VPN gateway
• A VPN gateway hosted by another cloud provider such as AWS or Azure
• An on-premises VPN device or VPN service

Connection result

AWS side

GCP side

Things necessary

• GCP account
• AWS account

Construction procedure