The 23-year-old striker, scored in all three group games as Georgia finished third in Group F before losing to Spain in the last 16.
Ligue 1 Lyon said they had paid Metz 18.5 million euros ($20.2m), with 4.5m euros in potential add ons and that striker had signed a four-year contract.
Mikautadze was born in Lyon and spent seven years in the club’s youth system.
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