Hi there,
Wait for WHAT , It works perfectly …? I think you are confused a tad. The GC9A01 driver is xiao agnostic… works with them all.The TFT_eSPI lib is what for a long while was only working with a specific LIb version 2.3.4 for Xiao. Nw the newer BSP supports the current one NO issue’s. (BTW ,your user setup is no good.)
Post the compiler output if you know how, the first 3 lines and the last 10 lines before the upload.
Go look here :>
Post the code you are trying? Use the code tags above “</>” paste it in there.
HTH
GL 
PJ 
ps, are you able to load and run USERSETUP test? what output do you get?