Yes, generally correct. Here is a really rudimentary example:
$100K MSRP car on a 36-month lease at a 4.8% interest rate and a 60% residual. Let's say it's an EV with $2000 of sales incentives and a $2500 down payment, and let's say it qualifies for the $7500 tax credit.
$100K - $2000 incentives - $7500 tax credit = $90,500 adjusted vehicle price. Subtract another $2500 down and you get to $88,000. This is called the total capitalized cost - the amount of principle still owed on the vehicle at lease inception.
The residual is 60% x $100K = $60,000.
Over the next 36 months, you have to pay the difference between the $88K that still needs to be accounted for vs. the original cost of the car and the $60K - that's $28,000. Divide that into 36 payments, and you get a $777.78 monthly payment.
But there's interest to be paid to the financing/leasing company, too. You're paying 4.8%. You pay the 4.8% on the AVERAGE of the total outstanding principle amount due on the car - not just on the $28,000 you're paying for in the lease. (remember, the leasing company is going to pass on the interest for the entire vehicle, not just the delta you're paying for in the lease - the mfr still has to get paid in full for the car, so it ties up all the money, not just the piece you're covering.) How do you calculate that? It's basically the mid-point between $88K and $60K, which you would calculate as ($88K + $60K) / 2 = $74,000. The easy way to calculate the 4.8% interest is to turn it into a "money factor" that tells you what to add to each lease payment, multiplied by the $74K. Money factor = APR in % divided by 2400. In this case, that's 4.8 / 2400 = .002. So, you add .002 x $74,000 = $148 in interest to each payment.
So the total monthly payment on this example is $777.78 + $148 = $925.78 each month, at the end of which the interest is all paid off and there's exactly $60K of residual value from the original $100K unaccounted for.
Note that we applied a modest down payment here. In this example, with these incentives and tax credit, but NO down payment, the .002 money factor would be applied to a larger principle amount of $90,500 (and midpoint of $75,250), making the interest portion larger - $150.50 per payment. Plus you'd also be covering $2,500 more principle per payment = $69.44 more per payment.
If you went crazy and paid the entire $30,500 in a single down payment, there would be no principle portion in any payment - but you'd still have a monthly financing portion to pay of .002 x $60000 = $120/month.
You can see that the range of total interest paid between no down payment and a "Full" down payment on the lease is ($150.50 - $120) x 36 = $1,098.
Obviously everything changes as you move the inputs of MSRP, residual, incentives, credits, down payment, and interest rate. I have no idea what the interest rate will be on a new Gravity - I assume it will be something closer to "market" interest rates than the teaser rates (closer to 0 APR) that companies sometimes use to incentivize sales.