I house them more like chins, because they are closely related.
You can go to You tube and find great vids of gu's.
My guys were a bit mishandled before I got them.
They are my 7th ones.
They were purchased and kept in a small hamster cage, it was 2 tiers high but small and narrow. They were kept by a young gal who then lost interest in them.
I got them a few days after my lone female passed on. I had two gerbils in a cage next to her to keep her company.
They do NOT do well alone.
They were about a year old when we got them and had not been handled.
We have moved into a smaller place and now have them in a 20 gal long. temporarily.
They each have their own wheel, they like to sleep ON each other and use the nest box as a sleepy place, but also have a smaller wooden house to perch on or nibble on.
I will have them ina 30 tall with ramps and different levels.
I kept a neutered/spayed pair that i got from the humane society in a large cage with wooden platforms that you can buy for chin types, and the pvc tubes, the ran on them, in them..
I have a friend that kept rats and she gave me the knitted yarn hammocks you can also use polar fleece, they do pee on them but love to sleep on them.
We don't let ours out unless we are holding them, as they don't really like to be held, or caught.. But I do it often enough to check them.