It's a "G"
You have a printout on a piece of paper using data that was entered into a computer by a human being.
It is a mistake, and it happens a lot. CA DMV actually has a process for correcting a VIN when there is a one digit mistake.
The second "0" could be correct, and its a 77, or it could be a "Q" and it's a 73.
Look at the gas tank cap. If there is a fuel door, then it's a 77. If there's no door, then it's not a 77.
Go to your frame, take a picture of the acutal VIN, and convince yourself that it is a "G."
Then go to your glovebox, and take a picture of the warranty plate. Verify that it coincides with the frame VIN. If it does...great. If it does not, then order a replacement from Marti.
Then go to your DMV with a verification of VIN and have the paperwork corrected.
That way, when I buy your Bronco and import it into the Republic of California, I don't have to bother you endlessly about the error. and CA DMV won't remand me to CHP and it won't take 14 months (yes, really) to get the title transferred.