The first Gukko birds were created by the Makuta using viruses and spread across the Matoran Universe. A large population eventually settled on Metru Nui and that same population fled to Mata Nui after the Visorak invasions. The local Le-Matoran made good use of the birds and formed the Gukko Force a military regiment composed of Le-Matoran riding armed Gukko birds. Afterwards when the Matoran returned to Metru Nui, the Gukko Force began protecting Le-Metru instead of Le-Wahi.
The Gukko bird was very swift and agile and is one of the fastest air Rahi after the Nui Rama. The Gukko was also very sociable and enjoyed Matoran company which is what made them easy to train in the Gukko Force.