Originally Posted by
Pat+
You will need to clear immigration and customs, as FRA will be your point of entry into the EU. I don't remember immigration ever being a hassle in FRA, but of course, YMMV. Be prepared to walk a fair amount if you need to change terminals.
Americans.....
GVA is in Switzerland and the Swiss might be everything but certainly not a member of the EU.... And if I had the choice, I would either connect in ZRH or MUC. ZRH gives you the advantage that you can clear SWISS immigration there and continue domesically, MUC is the easiest airport for a transfer.