Here's a helpful site:
1970 GTO Specifications - UltimateGTO.com
The Body plate serial number is not the same number as the VIN.
Assuming your car was built in Baltimore, the VIN should be: 242370Bxxxxxx
The last 6 digits of the VIN should match the stamped numbers alongside the water pump housing on the lower, right side of the engine block.
Your data plate indicates:
1970 GTO 2 door coupe/hardtop (70 24237)
Built at??? I think a solo "B" is Baltimore, but I'm not certain.
Trim (258) = Black interior
Paint code 47 = Verdoro Green
Upper paint (top) code B = Black vinyl top
Build date = 09C; third week of September (1969)
Maybe someone else can chime in with the meaning of the "B" and "0041" in the bottom lone of the data plate; I don't know what those mean.
To have a "matching numbers" car, all the engine/trans/rear end and other manufacturing dates must pre-date the assembly week.
For example, your engine block casting date will probably be late July or August, but it could possibly be as late as the first week of September, 1969.
Looks like a GREAT car; good luck with it and have fun!