The word "Gwayn" is spelled with a silent 'g' and pronounced as /weɪn/. The phonetic transcription reveals that the sound 'g' is not pronounced in the word, and the word is pronounced as 'wayn'. The spelling of the word can be attributed to its Welsh origin, where the letter 'w' is used in place of 'u'. This pronunciation leads to confusion among non-native speakers, who might spell the word as 'Guane' or 'Gwane'. Overall, it is important to keep in mind that the spelling and pronunciation of words can vary based on their origin and language.