The LG G2 is NOT a SIM/carrier locked device, no recent Verizon Global device is, even if it was there is no ROM that can fix that, that information is not touchable by flashing a ROM.
Insert your SIM, setup the APN settings, and make sure it is set to Global or GSM/UMTS, reboot, and you should be good to go, the only thing you will get is an unrecognized SIM error on the lock screen and notification pull down, but it works fine. People are are using the vs980 on a host of GSM carriers around the world.
Current Personal Phone: Google Nexus 4 on Cricket/Aio (Beanstalk
4.4.4 with hells-Core Kernel
Current Work Phone: LG G2 VS980 on VZW (AICP
Current Tablet: iPad 4 and Samsung Galaxy Note Pro 12.2
Other phones "in the family": HTC DNA, HTC One (M7), Motorola Moto G GPE
Previous/Retired Android Devices: HTC Aria, HTC Incredible 2, HTC Rezound, Samsung Stratosphere, Samsung Galaxy S2 Skyrocket, Nextbook 8P