Possible Clues:

• Network whose first broadcast was 'Gone With the Wind'
• Cable channel whose first broadcast was 'Gone With the Wind'
• It shows many B&W pictures
• Cable station for cinema buffs (Abbr.)
• The first film it aired was "Gone with the Wind"
• Cable sta. for old films
• RKO film airer, maybe
• Old-timey film channel
• Network advertising 'the greatest motion pictures of all time'
• Airer of many old MGM films