eGPU for my HP Zbook, is it possible?

Howdy all,
I'm looking to rig an eGPU to my HP ZBook 14 G2 and I'm having some trouble understanding what PCIE and Expresscards are. I've looked in datasheets for the laptop and on multiple online threads and I cant find anywhere saying my laptop is or is not compatible with eGPUs.

System Specs:

• Processor: i7-5500U CPU @ 2.4GHZ
• Installed RAM: 8 GB (only using one of the internal DIMM slots)
• System Type: 64-Bit OS
• Current display adapter: AMD FirePro M4150 The laptop runs KSP, Arma 3, World of Tanks, Mass Effect 3 all fine on low settings, I'm just looking to improve quality without breaking the bank.

I currently have my eyes on a GeForce GTX 950 FTW. What will I need to connect the GPU to the laptop, if my laptop is compatible with one?