Not the same as the '65 Pontiac, MI, Data Tags I have seen, and have on in my hand right now that mirrors the one I posted. You will note the difference at the top and the Pontiac plant is stamped "PON".
The Pontiac Restoration Guide also shows the 1964-'65 as you see here. The one they show for 1966 only had the "P" for the Pontiac plant and it has "General Motors Corp." on top like the '64/'65 as well. 1967 Tag appears to be the same, and in 1968 the top reads "Body By Fisher" - which is also on a 1968 Data Tag I have in hand.
However, If you do a search, that style of Data Tag does exist - at least on the internet, anyway. Each manufacturing plant did things differently and the Data Tags have differences. Pontiac had their own way of doing things. They may have ran out of one style and substituted the other style, or early year production used one style and later year production used the other. So I cannot say it is not correct. It looks legit, but who knows.
Here is a site that shows this: https://www.andysautosport.com/learn...specs/gto_vin/
And here is a post with the Data Tag like yours: https://www.gtoforum.com/f12/vin-id-tag-104250/
You should have the letter "P" on your VIN tag to match the Pontiac assembly plant. You can verify your VIN number with the stamped VIN frame number at the rear rail.
If you have not already done this, get the PHS documents for your car which will verify that the car was indeed assembled at Pontiac. I would also assume PHS can tell you if that style of Data Tag is indeed authentic and used by the Pontiac plant.