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G is found in 10-25% of males across all Iran and into Afghanistan/Pakistan, it also has the same presence in Azerbaijan, Armenia, Georgia region (Caucasus) and the Levantine coast. The Arabian peninsula and the central Middle East (Iraq,Syria) seem largely unaffected. This leads me to believe that G either originated near the Pamir knot region (Pakistan/Afghanistan) or on the Iranian peninsula itself, before migrating towards the Caucasus region heavily. From there the P15 branch shot towards south-Central Europe (Sardinia/southern italy). Look at the G map on Wikipedia, I am postulating an Iranian origin (G-M201) with a heavy movement solely towards the Caucasus region (G2a) with a small Neolithic arrival to south-central Mediterranean Europe.