It is my understanding that the gen 1 GTS comes with air suspension and sits lower than the other models with air suspension. Does the GTS have specific hardware that is different than the other models or is it a software setting somewhere?

 

All GTS models are 10mm lower than the non-GTS versions and it is software only. You can code the air system to different height levels (including below stock) so no hardware differences.

 

I know that you can recode the S with Air to GTS height. I don't think this proves that the strut parts are identical. Do we know if the parts are the same for the S and GTS?

 

I seriously doubt they are different for only a 10mm difference and have never seen any information that would leave me to believe the GTS has bespoke hardware. But, you can confirm if you look at the Porsche parts diagrams for the S vs GTS suspension.