There are new PFAS free DWR finishes, but don't know if Gore-Tex is using them yet.
Gore does not consider PTFE to be environmentally friendly and is working on flourocarbon free fabrics.
You're being confused by people who try to argue that Teflon is as PFAS.
[1] there are other ways of making Teflon, and the industry has been phasing out PFOA for a long time.
Gore-Tex is a PTFE membrane laminated one side of a fabric.
The other side of the fabric is coated with a DWR (durable water repellent) coating.
The DWR finish prevents the outer fabric from being saturated with water.
The DWR is not made from PTFE and historical has contained PFAS compounds.
It is not a permanent finish, so it definitely ends up in the environment.