documentation page with version specified works fine. e.g., https://googlecloudplatform.github.io/spring-cloud-gcp/6.0.1/reference/html/index.html

But if no version specified, use this link: https://googlecloudplatform.github.io/spring-cloud-gcp/reference/html/index.html
it links to 4.8.5-SNAPSHOT, see screenshot

This link is used in https://cloud.google.com/java/docs/spring.