GPADAT register in TMS320F28335

I am using TMS320F28335 for motor control application. epwms are generated at 100kHz and fed to MOSFET through GPIO pins. In order to find out the winding voltage, I need status of GPIO pins and GPxDAT register used for the same. I am not getting the expected result. does GPxDAT register update its value at 100kHz? 

thanks

Shinto Antony