The spelling of the word "GUB" may seem odd, but it actually follows the rules of English phonetics. The IPA phonetic transcription of "GUB" is /ɡʌb/. The letter "G" represents the voiced velar stop sound /ɡ/, while the letter "U" represents the short vowel sound /ʌ/. Finally, the letter "B" represents the voiced bilabial stop sound /b/. In short, "GUB" is spelled the way it is pronounced, following the phonetic rules of the English language.