The only place for it is back on the road. If I was the owner I would spit into GM's face and put a million miles on the odometer. It should be a private Uber.
Drive it and park it in front of the GM's headquarters. Do a cannonball run. These guys are Youtubers so I expect lots of great content. However I fear some of the more exciting ideas may not come to bear because "Influencers"/Press are usually afraid of OEM cutting off access. Hopefully these guys aren't in that group.
The owner already has an electric S10 as well, and the RAV4 both which use the same charging system as the EV1 so I'm just glad its an enthusiast who will rebuild it and run it.