Update README.md

Author: karlsoderby

README.md

@@ -4,6 +4,7 @@ This library contains a set of examples to use the [GIGA Display Shield](docs.ar
 - [ArduinoGraphics](https://github.com/arduino-libraries/ArduinoGraphics)
 - [Arduino_GigaDisplayTouch](https://github.com/arduino-libraries/Arduino_GigaDisplayTouch)
 - [Arduino_BMI270_BMM150](https://github.com/arduino-libraries/Arduino_BMI270_BMM150)
+- [Arduino_GigaDisplayGFX](https://github.com/arduino-libraries/Arduino_GigaDisplay_GFX)
 
 It will also install the [lvgl](https://github.com/lvgl/lvgl) library, which is required for a large number of examples in this repository.