How to add thickness to a gyroid?

I am using a gyroid form for a building I am planning. I downloaded a model that seemed pretty good to start with, however it has no thickness. Now I am at the stage that I need to add thickness to resemble structure, however I have no clue how to do it. Does anyone have any recommendations and advice on how I should proceed. Also the gyroid is not a standard one I tried looking for other similar models but with no luck.
I hope you will have some ideas.
Thanks in advance!

Depending on how it was made Joint Push Pull > Thickener might work.

It works with Fredo JPP, but it was easier for me with Blender and the Solidify modifier.