Does 2 year gap after 12 matters in psu interview?
yup it matters .... but a good reason can cover it up
BARC (Not a PSU, No weight-age to GATE score. Only interview matters)
NTPC
BHEL
RITES
IOCL
ONGC
DRDO (not a PSU)
Most of the PSUs give a lot of weight-age to GATE score. Therefore, try to score good in GATE and dont think about anything else. They will surely ask you about the gap, so prepare a valid and an authentic reason for the same. Do not criticize the College for placements nor the company where you worked/not joined. This will be the first question in every interview especially ESE interview, but there is no need to worry at all