apple music songs that I own not available for import

I'm using GB on an ipad and I have successfully imported iTunes songs into GB before. Now when I try to do it from Apple Music, nearly all my music is grayed-out and does not respond to the download icon beside it. I kind-of understand why this would be for the songs I've downloaded from the subscription but I can't import the songs that I owned before Apple Music subscriptions came along. Is there something I can do to import at least the tracks I own into GB?