I think you've misunderstood the word "backronym". "LG" would be a simple acronym - a backronym is where a word is chosen and then the letters it stands for is shoehorned into it. For example, the "USA PATRIOT act" is a backronym for "Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act". It's clear that the title "USA PATRIOT" was chosen well before they picked the words for which it would stand, hence a backronym.