If you have multiple email accounts, you can check them all in Gmail. Gmail’s Mail Fetcher feature first imports all your old messages to Gmail and then continues to bring in new messages sent to your other account. You can add up to 5 accounts, including Gmail and other email providers.
If you only want to get new emails brought into Gmail, try auto-forwarding your mail instead.
The configuration to access your email from Gmail is:
Secure SSL/TLS Settings
|Password:||Use the email account’s password.|
|Authentication is required for IMAP, POP3, and SMTP.|
More info on https://support.google.com/mail/answer/21289?hl=en