Porsche GTE fixed setup its considerably trickier to drive compared to the Ferrari GTE, mainly due to its rear-end wanting to snap almost on every high speed corner entry, followed by understeer due to its instability, its one of the main gripes with this overall car fixed set.
One of the main approaches is really trying to steer a bit less than the Ferrari (you can steer more once in low speeds, but in high speeds is about being more cautious)
Porsche is quite competitive once you understand how to work around the behavior tendencies.

Below you can find an overview on the driving approach on Le Mans, filled with tips and details, aligned together with telemetry and onboard data, hopefully improve your driving on this legendary track! Enjoy :)

General Driving Tips

• Dunlop T1-T3: Try to deep trailbrake into T2 with minimal steering, and make sure you priortize car rotation on throttle from T2-T3 to maximize corner exit
  
  
• Esses: Keep as tight as possible in the corner entry and left-hand side corner, but avoid fully going over the curbs, so you dont lose momentum
  
  
• Tertre Rouge: Important to maximize the track by going over the left curb to attack the corner carrying good minimum speed (avoid going over drainage after exit curb so you dont get off-track). Porsche fixed setup rear end snappiness will probably show itself, so being early on power and tanking the oversteer will help.
  
  
• 2nd Chicane: Again, important to use all track by going close to the grass before braking to carry better minimum speed, and have better angle to tackle first leg of the chicane (dip tires over the curb both corners to help rotate the car)
   
• 3rd Chicane: Same approach as 2nd Chicane
  
  
• Mulsanne: Deep braking when the right curb starts, aim for a wider angle so you can setup better exit speed for Indy straight
  
  
• Indianapolis: Porsche gets quite tail-happy on Indy entry, try to avoid overreacting on entry Set the corner entry on the green paint, with smooth (and slight) braking application avoid attacking over the right curb (surface is uneven), and keep the car on the right side close to the curb to setup deep corner entry as it is cambered, smooth throttle application so you don't understeer into the gravel 
  
  
• Arnage: Middle of the car on the red paint, so you brake over the curb and have better angle to attack inside curb and better position towards corner exit
  
  
• Porsche Pt.1: Easy section to take unnecessary risks, so strive to be precise. Smooth braking and steering to help point the car into this high speed right corner, drive around the yellow line (don't attack curbs upfront, as it bounces off the ideal line) Key to be smooth on throttle and steering, so you can be tight around carrying momentum.
• Porsche Pt.2: Understeer wants to have a big piece of the laptime, so feathering the brakes on entries helps stabilize the rear. Its important to be very tight following the right line to point the car correctly towards exit to last chicanes
  
  
• Ford Chicanes: Avoid braking too late and too wide (before the pit-entry curb), so you can manage the chicanes keeping momentum and setting a good exit towards the Start/Finish Line 

Electronics
Brake Bias: 54.5%
Traction Control 2
TC Power cut 2     
TC Slip Angle 8