What? Why do you say this isn't possible? This is a series hybrid vehicle, not a pure electric vehicle. Series hybrid has been done for a long time now: https://en.wikipedia.org/wiki/Diesel-electric_transmission

This is nothing new technology-wise.

If you think turbines aren't possible, you might need to have a word with... uh literally everything producing power with turbines since the 1910s. It's extremely well-proven, reliable technology. (It's just very bad at powering wheels directly, because it only runs efficiently at a single speed-- for a generator, however, that's perfect.)

CNG turbine. The truck is a hybrid.