binary:gnat-5-sjlj is NEW. Your package has been put into the NEW queue, which requires manual action from the ftpteam to process. The upload was otherwise valid (it had a good OpenPGP signature and file hashes are valid), so please be patient.
Packages are routinely processed through to the archive, and do feel free to browse the NEW queue[1]. If there is an issue with the upload, you will recieve an email from a member of the ftpteam. If you have any questions, you may reply to this email. [1]: https://ftp-master.debian.org/new.html