As per the last rank details of 2018 in GECT, you will have to secure atleast a rank higher than 200 (considering 3 round of allotments). B arch rank list is published considering the NATA score as well as the percentage of marks secured in senior secondary board exam. Average of both the marks are taken for the ranking purpose. A score of around 120+ is considered to be a good score for NATA. So, 119 seems to be a good score comparatively, and having a percentage marks of 92 for your +2 will increase the probability of getting into GECT. Hope you get it. Good Luck!