Can't believe this hasn't been posted, but we have TWRP running on the g2. The gr8 guys at xda figured it out. I have done a backup of my phone, and used Twrp to install a new boot animation. Info located at link below...
INSTALLING TWRP on LGG2 (VZW and AT&T so far) - xda-developers
INSTALLING TWRP on LGG2 (VZW and AT&T so far) - xda-developers