The current documentation (https://cloud.google.com/run/quotas#cloud_run_limits) states there is a 15 minute maximum timeout permitted (configurable) for a cloud run request
The request timeout for Cloud Run on GKE services can go beyond 15 minutes.
You can change this using the --timeout flag: gcloud beta run services update [SERVICE] --timeout=[TIMEOUT]
--timeout
gcloud beta run services update [SERVICE] --timeout=[TIMEOUT]
Read more about setting request timeouts in the official documentation.