Straight off the bat, this is clearly an extremely odd leak. Not only has LG been out of the tablet game for over two years now, but the Snapdragon 821 chipset just seems too old to even be available at this point. That being said, references to the G Pad 5, as well as LM-T600 or code-name TF10 have been creeping up all over the place. The LM-T600L (or LMT600L) has received a radio certification by RRA in South Korea. More crucially, the same model number was also spotted in a recent kernel source code upload entry on LG's own servers. LMT600, LMT600L and LMT600US were originally...
Source: https://www.gsmarena.com/lg_might_be_getting_back_into_tablets_with_the_g_pad_5-news-39190.php
