>>536563113
Gal Gun has quite a few vocal tracks

GG1 alone had 6

GG:DP had 5 (7 if you consider Shinobu's and Maya's individual versions of Twinkle Double Star to be different)

GG2 has only 2

On the topic of such, Gunvolt adopted much of it's composing philosophy from Gal Gun (each character having a unique leitmotif and even soundfont for major characters) as well as many Gal Gun songs becoming the basis for Gunvolt songs