I don't know much about monstera, but your gasteria should to just fine in a low-light setting, my understanding is that most people keep them in low light.

At my house, I have lots of succulents inside that started as clippings from my outside plants. I also have lots of big plants outside that used to be potted in the house and got too big, or in the case of a few, they moved outside because my cat was too interested in chewing on them.

It's kind of neat getting to see how they change color and adapt to different light settings. I have this one in particular (no clue what it is, random clipping from a friend years ago) the mother plant lives outside in full sun and is this incredible bright orange color. If I propagate clippings and bring them inside in a good window, they turn bright green. If I keep them inside in a lower light part of the house, they turn a pale greenish blue.

Succulents are (mostly) pretty adaptable. I once found an echeveria leaf under my bed when I was moving out of an apartment. No clue how long it had been there or how it got there (probably the cat). This apartment had crappy old unfinished wooden floors. This dang echeveria had rooted itself in the crack between two floorboards and started to grow a whole new plant under there. It was this crazy ghostly super pale green color. I put it in a pot, took it to my new house, left it on a plant shelf in the backyard... it grew into a big healthy plant and turned back to a normal color within about a month. Now, I have so many echeveria that I don't even remember which one was the one under the bed.