Assuming that CellNUVO gets to a point where numbers are restored, is there a way to move your number to Google Voice and retain your earned Silver and Gold?
I would say that is possible, but you would need to email Tom for that and/or support.
When I left Ting I went to Google voice and used Cellnuvo's number that Cellnuvo gave me.
I never had my real number with Cellnuvo
Hard to say - you'd have to ask cellnuvo. With cellnuvo being small they may be open to this kind of thing.
I think considering the silver system is separate from the cellular side, cellnuvo could allow it. Normally though with other providers porting closes the account and all is lost. Freedompop being an exception.