Did you search the forum for your particular model of GLCD?

Did you start a thread asking for help on code or schematic?

There's already several examples on these forums. Sometimes you can use techniques used for one model and customize it for another with just a few tweaks.

There was one particular model that I had used that had no examples anywhere on the web. I started with the datasheet, found a "close model" and went on from there.

Putting too much functionality into PICs is not necessarily a good idea, it takes up space. Imagine if all PICs now had DT's interrupt, barely enough room to LCDOUT "Hello" on most of them, if at all.