Not directly, but you can quickly recreate the mailing list in Google Apps as follows:

  1. Open Outlook or Notes and display the addresses in the mailing list.
  2. In your Google contacts, click the New Group button and enter your new group name.
  3. In the Add to group field, start typing the email address of a contact in the Outlook or Notes mailing list (refer to the open mailing list for the addresses).
  4. When the contact appears, select it. Google contact manager adds the contact to the new group.
  5. Continue adding contacts to the group.