what were the G-cells used for?

From what I've gathered, the G-Cells were supposed to play a major role in the game's storyline, and the number you collected would have an effect on the outcome of the game. Unfortunately, the story was pretty much shelved, aside from two cutscenes. It seems now that the only function the G-Cells serve in the game is acting as health powerups and adding to your total score.

The Vortakk were trying to collect them to enhance their monsters and so the player had to instead. Also they give extra XP.

thank you guys the question had been bugging me for years i just realised i could ask you gus XD

It is, or was, one of the biggest groups of G nerds around