The C130J was B-RNAV certified but only if the mil-standard GPS was removed from the solution and the ac was in range of land-based navaids to update the INSs. It wasn’t going to be fully PBN until fitted with civil certified GPS, I forget which block upgrade that was intended to be on.
Only a fool would actually have deselected the GPSs though. The database in the CNI-MU (FMS) didn’t support RNP approaches & departures anyway.