Hello again,
I managed to get the GLCD working on the MEGA. The issue was a different pin assignment for the MEGA. However, not all is good.
RTC is not working, I have changed the chipSelect to pin 53 as described in the examples.
And I still have problems writing to the LCD. I will figure it out, but GOD, this is a pain in the behind :))
Has anyone got good experience with serial GLCD's? Are they easier to program? Or maybe the color screens I see on youtube...