The Collaborative International Dictionary of English v.0.48:
Gilt-edge \Gilt"-edge`\, Gilt-edged \Gilt"-edged`\, a.
1. Having a gilt edge; as, gilt-edged paper.
[1913 Webster]
2. Of the best quality; -- said of negotiable paper, etc.
[Slang, U. S.]
[1913 Webster]