The spelling of the word "gruber" follows standard English phonetics. According to IPA phonetic transcription, the word is pronounced as "ɡruːbər". The first syllable "gru" is pronounced with a long "u" sound and the second syllable "ber" is pronounced with a short "e" sound. The "b" in "ber" is pronounced like a voiced bilabial stop. Overall, the spelling of "gruber" accurately represents its pronunciation in English.