Hi,
refer to pin mapping of the EVB user guide for signal location on EVB pin headers.
PetrS_3-1668503728557.png
Using Table 1. MPC5644A signal properties within device Reference Manual you will know GPIO/peripheral function/signal correspondence
PetrS_0-1668503574170.png
Thus GPIO87/88 will be on PJ1 connectors
PetrS_2-1668503707982.png
BR, Petr