I hadn’t noticed this before…You can have Dynamic Keyboard shortcuts in Gimp. Meaning that when you are using the program you can just assign a keyboard shortcut to a function on the fly with out going to prefrences.
Click on File->Prefrences->Interface
Turn on “Use Dynamic Keyboard Shortcuts”
Now, when you are editing an image and select something from the menu. Highlight the menu selection with the mouse and while it is highlighted hit a key stroke combo.