What is the grammar of ご機嫌【きげん】よう?


What is the grammar of ご機嫌【きげん】よう? It is made of three or, we might say, two
parts:

` ` ` ご ` ` 機嫌【きげん】 `  
` Good spirits  
 _with honorific_ ` ` ` よう ` `

What is よう? Is it 様【よう】 in the sense of "form, style"? Per
[jisho.org](https://jisho.org/word/%E6%A7%98-2) this word is often a "Noun -
used as a suffix".

Would ご機嫌【きげん】よう then be a noun?

