Do You Say Gnomes?

Since GNU is GNOME's first name, GNOME is officially pronounced "guh-NOME". However, many people pronounce GNOME as just "NOME" (like those short people from legend), nobody will hurt you if you find this pronunciation easier.

Is the G in GNOME silent?

For example, the initial ⟨k⟩ is not silent in words such as German Knecht which is a cognate of knight, Knoten which is a cognate of knot, etc. Likewise, ⟨g⟩ was probably a voiced velar plosive and the initial ⟨g⟩ was not silent: for example, German Gnom, a cognate of gnome, Gneis, a cognate of gneiss, etc.

What is a correct pronunciation?

Pronunciation is the way in which a word or a language is spoken. This may refer to generally agreed-upon sequences of sounds used in speaking a given word or language in a specific dialect ("correct pronunciation") or simply the way a particular individual speaks a word or language.