I've looked through all the keyboard shortcuts in gnome-settings and dconf-editor and there were a lot of common shortcuts that I couldn't find. For example: the shortcuts for moving around text, highlighting text, copying and pasting, as well as some other stuff.
In particular, I would like to know how to remap SHIFT+HOME (which selects to the beginning of a line) to CTRL+SHIFT+🠨 to make it more like how it works on Mac OSX.