Go to Google Account Login and enter your credentials.
Look for a button labeled "Start Appeal" . If this button is missing, your account may not be eligible for restoration.
If your account isn't disabled but you simply cannot log in due to a forgotten password or security lock, use the recovery tool: Tips to complete account recovery steps - Google Help
Accounts left unused for a very long period may be marked as inactive. 2. How to Unblock and Restore Your Account
To unblock or recover a disabled Gmail account, you must typically go through Google's official appeal or recovery process. Google disables accounts for various reasons, including policy violations (like spam or harassment) or suspicious activity. How to Unblock Your Gmail Account