Looks yes, absorbed humidity for sure. Dry it in a low temp oven, or replace the desiccant.But, as I said, the desiccant still looks the same as the day I opened it.
Do you have a hygrometer?
All my safes are in air-conditioned spaces. No rust, no problems.
Humidity will only affect safes in unconditioned spaces.
If I understand it right, the golden rods don't actually lower the humidity but they do create a slow circulation of air within the safe that prevents any concentration of humidity near the floor. The same circulation prevents any condensation on any of the guns. I've had one in my safe since it was brand new 20+ years ago and never had any rust issues.