PCIe Lane Sharing with 1.0 x1 Card

Hi, my motherboard is a Z77 and I'm using an i5-3570k.

It happens that the PCIe 3.0 x16 slot that my GPU is using, has its speed shared with the only remaining PCIe 3.0 x8 that is not blocked for me to use.

And I want to install a PCIe 1.0 x1 Wifi adapter card into that x8 slot.

If I do that, what PCIe speed will my GPU be limited to? I am asking because I am afraid my GPU might have to also run at revision 1.0 speed with the slower adapter card installed.

Please advise.
 
Ok I got my problem solved, I got a PCIe x1 riser today and it managed to fit into the second x4 full length PCIe slot that my GPU was blocking. That slot has it's own dedicated PCIe lanes so I don't have to worry with a PCIe adapter anymore!

Thanks smeezekitty for your input :)