DAZ STUDIO (CLOSED)
Hi there! It depends on what it is, and how much work you are willing (or able) to do. Characters, clothing, and other objects that are not static need to be "rigged" to work correctly in Daz.
Also, if it is not textured for Daz, you will have to do that yourself. If you have shaders, you certainly can import any old OBJ into Daz Studio and texture it yourself - as long as the object is properly UV mapped.
If you want to try it out and see how it works, there are some free 3D models right here: https://www.renderhub.com/free-3d-models
Give it a try and see how it goes. I'm not sure what you're looking for - but they do have a Daz Studio product section here. https://www.renderhub.com/3d-figures-and-assets
If you have any other questions, don't be afraid to ask.