The spelling of the word "GAINAS" is relatively simple once you understand the IPA phonetic transcription. It is pronounced as ɡeɪ.nəs. The "G" is pronounced as "ɡeɪ" and the "A" as "ə". The "I" is pronounced as "aɪ" and the "N" is pronounced as "n". The final "AS" in the word is pronounced as "əs". So, when spelling "GAINAS", you simply need to remember to follow this pattern for each individual letter and sound.