Implementing health check for a website hosting in GCS bucket

Question

I have hosted a static website in the GCS bucket and another website in Google Kubernetes Engine (GKE). I have configured the load balancer with two backends having a reserved IP associated with the proper host and path rules. Both applications are working fine.

I have implemented the health check configuration inside the load balancer so that it can send an HTTP GET request to a request path. So far, the health check function is working for applications that are in GKE and I am getting proper logs but it's not working for the one that is inside the GCS bucket.

I found that as GCS is a vastly available managed Google service, there is no way to implement the health check the way I did. So please give me a suggestion on how to do that.

I am thinking of creating an external health check to ping the URL from somewhere else, so I can get logs related to a healthy URL or not. or is there any other way to implement it?