Here are some Godzilla MIDIs that I have found on the net. If you have anymore send them to me via email here
Blue Oyster Cult song "Godzilla"
Godzilla Theme
Godzilla Theme (Different Version)
Ghidorah Theme
Mothra Song (From The Cosmos)
Godzilla 1954 Music
Destruction of Tokyo (G 1954?)
Terror Of Mecha Godzilla Theme
Godzilla Vs. Destroyer Intro
GMK Main Theme
Ambush (GMK)
Protect The Future (GMK)
Ghidorah's Theme (GMK)
GMK March
Music from Super Godzilla SNES Game
Godzilla NES Game Midis (Zip File)