The spelling of the word 'gat hot' can be explained using the International Phonetic Alphabet (IPA). 'Gat' is pronounced /ɡæt/ with a hard 'g' sound as in 'girl' and the short 'a' vowel sound as in 'cat'. 'Hot' is pronounced /hɑt/ with the 'h' consonant sound followed by the open back unrounded 'a' vowel as in 'father' and the unvoiced 't' consonant sound. Therefore, the correct spelling for this word would be 'gat hot'.