Most of Gordon’s big band charts are published by Alfred Publishing and can be purchased from your local sheet music dealer. But if you’re asking, here are some good options:
Alfred Publishing
JW Pepper

Gordon has listed many of his charts (including his 6 horn charts and all of his “older” charts) with Walrus Music Publishing.

Here at gordongoodwin.com, we offer you the chance to get some of Gordon’s lesser-known and more “exotic” compositions, available as PDFs or as printed copies:

• The Leblanc Suite(Duet for two clarinets in three movements) Composed for Eddie Daniels and Larry Blank.
  $50.00
  
• Three Stages for String Quartet
  Movement 1 Focus
  Movement 2 Contemplation
  Movement 3 Resolution
  $50.00
  
• California Pictures for String Quartet
  Movement 1 Oakland
  Movement 2 Carmel
  Movement 3 Venice
  $50.00
  
• Duet for Cello and Marimba
  $35.00—Temporarily Out of Stock
  
• “Somewhere Over the Rainbow”for String Quartet
  $35.00