In a filing to the BSE on Friday, GTL also said requisite majority of lenders have "in-principally" approved the proposed merger.
The implementation of the amalgamation scheme is now subject to receipt of the requisite statutory approval, including from the applicable National Company Law Tribunals, it said.
The merged entity would continue to operate as GTL Infra.
Deals beyond a certain threshold require approval from the Competition Commission of India (CCI), which keeps a tab on unfair business practices across sectors.