So, I did have Arduino_GigaDisplay_GFX installed, but again I changed the default sketch directory and the IDE couldn't find stuff after that. Kind of embarrassing that I've had to learn that lesson 2x. Removed all the lib's related to the giga board + display, re-installed, and that seems to have fixed it. I'm starting to accept that I can't separate my projects in different directories - it breaks too much stuff when you do that. Thanks so much for following up!