The word "GPMPH" is a unique example of spelling based on phonetics. In IPA (International Phonetic Alphabet), this word can be transcribed as /dʒiːpiːɛmˈpiːeɪtʃ/. It represents the amalgamation of the initials of the four nitrogenous bases - guanine, cytosine, adenine, and thymine – that make up the DNA molecule. The spelling primarily follows a sound-based approach, rather than the conventional orthographic rules. It is a useful tool for those who are familiar with the DNA base pairs and need a quick reference.