I don't think there is a known material that wouldn't be damaged by gamma rays but it's a statistical process and we just don't have that many gamma rays on our surface.

I was wondering about space applications.

A sheet might maybe self heal after gamma radiation, that is why I asked (depending on environment, there might not be much else to happen?). Most other radiation is charged and might be kept away with strong magnetic fields.

But, as I wrote, this was a long time ago.