After messing around with the Gemini Keyboard input method some more, I discovered some bugs that are annoying. The worst is that bringing up the symbols box sometimes leaves a blank space at the bottom of the screen when you try to position the cursor with your finger on subsequent occasions. Super annoying.
I also think it is ridiculous that Planet made a dedicated backslash key in its US English layout. This is a character that is rarely typed on a non-Windows machine. The pipe character also is rarely typed as well. Instead, they should have made dedicated quotation mark keys as both are used more in every possible context (including command line use) than backslash and pipe.
Luckily, there is an Android app that allows you to customize key mappings. It's called External Keyboard Helper and can be downloaded in the Play Store.
EKH does not work with the Gemini's Function key maps, however, so I had to recreate the ones I wanted via the EKH interface using the Alt (Planet) key. I wasn't interested in the system functions though, so did not bother with those, only characters.
Now that I'm finished, I have a proper quotation marks key, no annoying symbol or emoji popups ever, no blank space to clear up at the bottom, and I also flipped my comma and period keys to be more comfortable for me.
Most of the Planet shortcuts I actually want (Screenshot, app switch, Caps Lock, and Power Off) still work as well, I am happy to say. I would like the volume keys to function but I suppose nothing is perfect.
