Download the iG3L Source Code
(Bottom of page)
On this page you can download the CSS file for iG3L, and do whatever the heck you want with it. This page is actively updated, and a manual on how to mimic the pre-iOS 7 design fully will be coming soon.

iG3L's development is far from over, but you can download the current version, 1.2.9, below...it'll be out-of-date soon though. :P

Outdated versions will always be available, as I believe everyone should have a downgrading right. :)

1.2.9 is essentially just a "Quality of life" updates with some minor changes and adjustments.

Packaged ZIP files containing all resources needed to create an iOS-like webpage (images and scripts), will be available with the CSS file soon.