Would you look at that. Just one day after the Google Play Edition of LG's G Pad 8.3 went on sale, the CyanogenMod team gets an Android 4.4 build out for the standard retail version. A new CyanogenMod 11 nightly is available for the "LG V500."
But if you're planning on flashing this to your shiny new Google Play Edition tablet, you should hold off. CyanogenMod team member Ricardo Cerqueira says that the retail V500 build won't work on the G Pad 8.3 GPE, model number V510. The team will need to modify the installation procedure in order to get everything squared away, though I doubt it will take them long.
CM 11, based on the AOSP Android 4.4 code, is only a couple of weeks old itself. It hasn't made it to the full list of devices officially supported by the custom ROM, though all the Nexus devices currently being updated in AOSP have been given more stable M builds. Buyers of the new Google Play Edition of the Sony Xperia Z Ultra will be happy to know that CyanogenMod already supports the retail version of that phone, though it's still on CyanogenMod 10.2 (Android 4.3). The GPE Z Ultra will probably need the same modifications.
You can download the one G Pad 8.3 build on CyanogenMod's download page, though of course you'll need a custom recovery like ClockworkMod or TWRP to flash it. Remember that if you want access to the Google Play Store and other Google services, you'll also need to flash the separate Gapps package.