When you google for "PSoC ILI9341" you find quite some example projects. They are for PSoC4 and 5, but can easily be adopted for the PSoC6.
We have plans to release an official component supporting LCDs in the next version of PSoC Creator (to be released in Q3).
At the moment, you can refer to the following code example:
It uses a UDB component to interface with a TFT LCD.