The spelling of the word "gierke" follows the International Phonetic Alphabet (IPA) phonetic transcription. The word is composed of two syllables: "gier" and "ke." The first syllable, "gier," is pronounced as /ɡɪr/ with a short "i" sound followed by an "r." The second syllable, "ke," is pronounced as /kə/ with a short "u" sound and a schwa. Therefore, the correct spelling of the word "gierke" accurately represents its phonetic pronunciation.