Questions about Hohem iSteady Pro 4

4K? Certainly suitable for Gopro 12, no matter what resolution you set on the camera. The gimbal has nothing to do with it

It's just a holder, not a camera. You have to check whether the camera is capable of this.

Good evening there is no space for memory card it is just a plug to change the stabilizer

Yes, the Hohem iSteady Pro 4 gimbal is compatible with the GoPro Hero 12. It supports the GoPro Hero 13/12/11/10/9/8/7/6/5/4/3 models, and is designed to work with action cameras of similar size and weight.