1969 Dart Rally Gauges?
It was not an option for the US market. What they did elsewhere I'm not sure, the dash frame itself is different. Adding the rallye dash is pretty easy though, you can just bolt in the rallye dash frame from a barracuda. So, it could easily have been an option for other markets.
The US market GTS specs from hamtramck-historical. The whole dealer data book is there
The 1970 Hamtramck Registry - 1969 Dodge Dealership Data Book - Dart
The GT instrument panel