the geico gecko is a species phesulma (day geckos). He is a giant madagascar day gecko Phelsuma madagascariensis grandis. A species native to Madagascar, being the largest species of the day gecko, and due to this little green fella we see on commercials, they are one of the most well known day gecko species.
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Primarily the island of Madagascar.
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If your talking about accent, then no. He is British.
If your talking about where he lives, like the other user mentioned, he is from Madagascar being a Giant Madagascar Day Gecko!