The spelling of the acronym "GPT" is fairly straightforward when using IPA phonetic transcription. The first two letters, "GP," are pronounced with a hard "g" and a short "p" sound. The final letter, "T," is pronounced with a soft "t" sound. The entire word is pronounced as follows: [dʒiː piː tiː]. This simple pronunciation guide can be easily referenced when reading or discussing the term "GPT," allowing for clear communication and understanding among all parties involved.