For the FT810 VCC must be of 5V. Don´t worry, the back shield of the TFT have two logic level converters (5/3.3V). This is the datasheet for the FT810
Then the correct wiring for UNO is this:
FT810 (HotMCU) Arduino UNO (GD3 lib)
MOSI pin 11
MISO pin 12
SCK pin 13
GND GND
VCC 5.0V
CS pin 10
PD and INT are not needed to the GD3 library