Papasmerf,
Good! Good! Wasn't that good K-9?
K-9: Very good master
Oh terribly good! You know, I think he's gonna be alright. Very alright.
K-9: Very, very alright.
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Actually, Gyaos came from the 1967 movie "Gamera vs Gaos", which was released in the United States under A.I.P. International as "Return of the Giant Monsters". Gyaos (aka: Gaos) returned in 1969's "Gamera vs Guiron" (aka: "Attack of the Monsters") as a silver incarnation on a frozen planet. The 1995 movie "Gamera: The Guardian of the Universe" had those 3 incarnations you can see on the link you provided. Gyaos returned in 1999 in "Gamera 3: Incomplete Struggle" and Albino Gyaos in a special independent film titled "Gamera 4".
But the new Battlestar Galactica stripped it away as Gyaos Baltar, but mispelt it as Gaius Baltar, and rather than fix the error already broadcast, they went with it the way it was. Yep, I know Gyaos.
Gyaos Baltar (Vice President of Caprica), voting HILLARY in 2008!