I provide the GLUE_Demo_480x320 sketch as an example to show the UTFTGLUE class.
The UTFTGLUE class makes it simple to "port" a sketch that was originally written for the (rather obscure) UTFT methods.
If you look at the "UTFTGLUE.h" file you will see that it identifies your controller and starts a genuine MCUFRIEND_kbv object with begin(ID)
I strongly recommend that you stick to UTFT methods and don't mix up Adafruit and UTFT.
UTFT has an void InitLCD(byte orientation) method.
So if you want to use PORTRAIT mode, you would say myGLCD.InitLCD(0);
If you have a problem, it is always worth saying what you want to do. e.g. write very big text
And posting a snippet or perhaps your complete sketch.
Then someone can show you what to do.
David.