How connect the gcp vpc to mongodb atlas aws by private?

Currently, we are using the aws, gcp cloud. we have a problem about connecting from gcp cloud to mongodb atlas aws via internal. Because it’s a difference the provider cloud. So, we can not peering between 2 vpc.
How can we config on this case? please help me.

MongoDB Atlas always requires private TLS network encryption: it’s just that you need to add the public IP of the source context to the Atlas access list