Still have my original GG with my games and carry case that I had from new as a kid
. Did recap it as mine had the dim screen and quiet audio but haven't attempted to change the LCD. Wouldn't mind attempting it but I'd hate to break something as soldering is not one of my skills.
The GG was way ahead of its time though and we never had something really close until the PSP 14yrs later and it took Nintendo far to long to rival those two handheld designs with the switch 27yrs after the GG, don't count the DS as it looks nothing like it.
That tube backlight really did suck those batteries dry fast, did have the external battery pack once that was pretty decent but that's longer gone.
Think my GG was used more often plugged into the mains than its was on batteries