G̃ Explained

G̃ / g̃ is a letter which combines the common letter G with a tilde.

The letter does not exist in many alphabets. Examples of alphabets with this letter are:

• Guarani alphabet – where the tilde marks nasalization of pronounced as //g//, representing the sound pronounced as //ŋ//
• Filipino alphabet – during the Spanish colonial period and up to the mid-20th century, adopting Spanish orthography for the Tagalog language
• Sumerian language – an extinct language, where it is used to transcribe the cuneiform script.
• Northern Sámi orthography – g̃ appears in the Sámi alphabet used by Rask in Ræsonneret lappisk sproglære in 1832

The letter is also occasionally used as a (stylistic) substitute for Ğ in languages such as Turkish.

Computer encoding

Unicode encodes g with tilde with a combining diacritical mark, rather than a precomposed character. As such, the tilde may not align properly with some typefaces and systems. Additionally, owing to the difficulties in inputting this character, Guarani speakers often replace it with g with circumflex (ĝ) or omit the diacritic altogether.^[1]

Letter	Unicode sequence	HTML
G̃	U+0047 U+0303	G ̃
g̃	U+0067 U+0303	g ̃

References

1. Web site: Redish. Laura. Lewis. Orrin. Guarani Pronunciation and Spelling Guide. Native Languages of the Americas. 16 September 2015. Most Guarani speakers don't use this character, instead spelling this sound the same as a plain g..