So I want to mention the very first version of Hidden Gems, the first version wasn't actually this one

The original version goes something like this:

Fazbear Entertainment had recently closed down the 1987 Freddy Fazbear's Pizza, the company decided to reuse the Withered Animatronics as well as the Puppet, They were given a new look known as the "Gems" upgrade, these would make (most) of the Animatronics look like a mix of the Unwithereds and the Funtimes with a hint of crystalized texture. They would be used as a Travelling Service Animatronics (similar to FNaF AR's Fazbear Funtime Service) They would be sent to a restaurant for a week and then be returned to the company. There is also a Toy Chica seen in the trailer (for some reason)

You would play as a night guard in of these locations and would have to survive from the robots, if I remember correctly, it would've had use constantly recharging the cameras using a set of batteries found in the box and these would be limited, there's also an upstairs portion of the office but I can't remember what it was used for (I'll try and gain more info soon)

Hope this helps, I'll continue this large set of comments once I have more content!

Update on V1: I found the link to a trailer of it https://youtu.be/EAP4s_w-xPQ