Another way..
Drop your SGU MGU onto charttranslate.exe
and it will create "Song name.mjb"
open it with Notepad

Code:
Name: "PopShining" RealTracks with "Held Chords" Guitar
Meter: 4/4
Style: Swing
Key: F
Tempo: 120
Chorus: bars 1 to 32 (repeat 1 times)
Sections: 1A 9B 17A 25B 33A
| F | C | Bb | C |
| F | C | Bb | C |
| Dm | C | Bb | Gm |
| Dm | Bb | F | C |
| F | F | F | F |
| Gm | Gm | Gm | Gm |
| Bb | Bb | Bb | Bb |
| F | F | Gm | Gm Gm _ _ |
| F |