It's not yet confirmed if it is the actual stage but it looks like the image she tweeted in february.
foto
Lady Gaga
born this way ball tour
stage
2012
This Lady Gaga foto might contain
bata, brownstone, kawasan perniagaan, pusat bandar, daerah perniagaan, downtown, jalan, tempat kejadian bandar, tetapan bandar, menetapkan, bandar tempat kejadian jalan perbandaran, and bandar.