Hello joãopaulo,
In this community space, we try to answer questions related to Model Based-Design Toolbox. For the previous one, it happened to know the location of the DEVKIT-MPC5748G - Design Files so I just provided that. Unfortunately, I don't have the tools to perform the operation you requested.
As far as I understand, you only need the pins header locations for your shield.
One of my suggestions would be to try to open the Gerber files and get the information required from there.
Another important piece of information I can give you is that, according to the QSG here https://www.nxp.com/docs/en/quick-reference-guide/DEVKIT-MPC5748G-QSG.pdf , the board is Arduino UNO R3 footprint-compatible so, being an open-source project you can get more easily the locations you need for the Arduino shields. You only have to use 2x headers but there are the universal 2.54.

If this is not helping you, please open a new NXP support case according to the following procedure: https://community.nxp.com/docs/DOC-329745
Hope this helps,
Marius