Finally, the credit-card sized S6/USB board world has a member that has the GTP cores, and the pins brought out. As far as I am aware of, this is the first one.
@O-K, have you actually tested the traces of these GTPs ? Can they do 1.25Gbps over the connectors ? Thanks:)

Yes, of course. We’ve had customers using these for over a year and a half now.