Not in any order:
Love Droid
Beyond the Spectacle of the World
With Respect Lelouch
TOY
Poker Face
Coward Mont Blanc
Lie and Diamond
Happy Synthesizer (with Luka)
Be Myself
Blue Butterfly
Matryoshka (with Miku)
Breath
Circus
Full Volume
Holography
Liberty Heart
Naname World
Raid of Glass
Eat Me
Eye Examination
Late Excuse
Panda Hero (with Luka)
Campanella
Aitai
Bad Apple
Bird's प्यार Song
Cutoff Line
Dance Floor
Emiria
Eraser
For My Soul
Killer Lady
Love is Certainly Fast
Mozaik Role
Rosetta
Sorry to You

This सूची consists of songs under the genres of pop and rock. Gumi is a Vocaloid under the शीर्षक of "Megpoid." With an interesting...