Chainfire has killed two birds with one stone, and put a few "first" notches in his belt today! Not only did he release the very first root exploit for the Galaxy S4 GE he also released the first ever root method for Android 4.3! This root method included a few mods to SuperSU. According to Chainfire's Google+ post it is not clear whether the holes where in Samsung's firmware, or in 4.3 in general. In order to install this root you will need to already have a custom recovery installed. You can then grab the flashable zip and install it in recovery. Chainfire is known for his one click CF-autoroot program, but says it is not needed since in this case you would already need a custom recovery in order to instal the leaked 4.3 firmware. Download and more information can be found at the source link below.