Hi Husna,
Gateway Timeouts happen from time to time with Cloud WordPress when the server is experiencing high traffic. They normally last 20 minutes to an hour before everything gets back up and running properly.
I checked the URL you attached in the thread and it looks like your issue is the actual page location could not be found.
Are you attempting to access the website directly from your BoldGrid Central “Cloud WordPress” dashboard or are you attempting directly from URL? If the latter, you may want to confirm that that the URL is correct.
If this is a brand new cloud instance, I’d encourage you to use the “Recreate” option to reset the parameters or delete the instance and start a fresh one.
I hope this helps! Please let us know if we can offer further assistance.