No, Google is not ending its 15GB of free Gmail storage policy — it's testing a 5GB initial limit that jumps to the full amount if you add a phone number

Gmail app listing.

• Google is changing its storage policy for new Gmail accounts
• New accounts in some regions will only get 5GB of free storage space
• Adding a phone number will unlock the standard 15GB of room

For many years, Google has given users 15GB of free cloud storage space when they sign up for Gmail (which is actually shared across Gmail, Google Photos, and Google Drive) — but a change to that policy is now being trialled.