Smoke me a kipper...
Most gallery apps have an option to view images by the folder they are stored in, so you should be able to do this anyway. Google Photos doesn't, but that's typical of Google's "we know best" attitude, and it's really easy to solve if you just download another app.I mean like if you have several photos that you want to keep inside each music folder. Seperated and find them really easy, instead of scrolling through several photos of clouds, people, trees even, then you will know "Hey there is my workers at heart." Share it really quicker that way.
But that was really the bit I didn't understand: when you said you wanted to be "without any means of downloading one via the store". Because that would mean you were stuck with whatever the manufacturer put on the device, which seemed to me to be extremely undesirable. As long as you can download another app you don't have to put up with whatever junk is pre-installed, but there is no way that manufacturers (including Google) can be relied on to make good choices of what apps should come pre-installed.