This xda thread created by ShyamSasi includes an extensive collection of G2 mods and themes. There's also a ton of wallpapers.
[INDEX] List of Themes and Mod’s for LG G2 - xda-developers
You need to be rooted and have custom recovery to use the mods.
[INDEX] List of Themes and Mod’s for LG G2 - xda-developers
You need to be rooted and have custom recovery to use the mods.