Hope someone still reads this
Could you please share the connection diagram or at least tell me how do you interface the ILI9327? Are you using 16Pins for all 16bits (and how do you do this with PI), or you are using SPI?
I've got the display like yours, and it is working with Arduino (with this "16pin mode", do not know the right name). As far as I see from datasheet - it can also work in SPI mode, which will be great!