The phrase "gat down knees" is commonly used in the southern United States to describe kneeling down in a submissive or respectful way. The word "gat" is actually a phonetic spelling of the word "got" and is pronounced with a short "a" sound, like "gat" in "cat". The word "down" is pronounced with a long "o" sound, like "dohn". And "knees" is pronounced with a silent "k" and a long "e" sound, like "neez". So, the correct pronunciation would be "gat dohn neez".