The spelling of the name "Gladis" can be explained using the International Phonetic Alphabet (IPA). The first sound is represented by the letter "g," which represents the voiced velar plosive consonant /g/. The following sound is a voiced alveolar fricative consonant /ð/, represented by the letter "th." The third sound is the long "a" vowel sound, represented by the symbol /eɪ/. Finally, the word ends with a voiced alveolar fricative consonant, the letter "s," representing the sound /s/. Thus, Gladis can be pronounced as /ɡlædɪs/.