No, the G Model is far different; 48volts, Volta system, no generator, underhood second alternator (generator) and many other electrical differences including auto start. My van simply has Lithium batteries and an inverter and a battery monitoring system, which the 2018 G models did not.
How many batteries did you go with? Did you use the GC2 ones or the standard ones? Be great if you did a quick video showing how the batteries are in there.