I could be wrong, but as far as I know, Electric has no PDK import.
Since you should be able to get the Electric source code [
http://www.staticfreesoft.com/jmanual/mchap01-04-01.html ], almost
anything should be possible with it. You could try writing yourself
additional code for Electric to import PDK. However, this source code
you write and PDK you use might not be sharable with others due to NDA.
The PDK having NDA is an issue as others have discussed in the Electric
group before. On the other hand, the 'fictitious' PDK, while available
to the public, might not be of interest as that implies there is no
foundry or untested processes for fabrication. In other words, the
circuits designed in Electric cannot be manufactured or they might be
broken when you manufacture them (until you can refine the manufacturing
process). The commercial companies tend to spend lots of money on
manpower, equipment, and supplies to refine their manufacturing
processes. So, it should not be surprising that they protect their
processes with NDA and why people use them (when they don't have the
resources to refine the processes themselves in their own laboratories).