BMW F8X M3/M4 GTS Flash

[evo400]

Has anyone done the GTS conversion?
What files need to be replaced?
M4 GTS DCT Performance Flash ?
GTS Differential ?
GTS Electronic Power Steering ?
GTS Traction Control?

Yes I did. Its a similar procedure to when your doing Alpina flash. You need to changes the type code and then you will need to play with production dates and istep shipments until you generate 000038c1 code which is for GTS. 

Some modules will have Hardware incompatibility which you can still flash at your own risk. ( the boot loader is the same) 
And do not flash DME ( it will flash fine, but you need a GTS Fsc code to be successful) 

It a trial and error at first. After you do it a few times its a smooth sailing