The coalition said in a report released on Friday that there were serious regulatory flaws in the GEAC’s decision.
New Delhi approved GM mustard, part of the rapeseed family, to help cut down on imports of the country’s costlier cooking oil.
The government did not immediately respond to a request for comment sent outside business hours.
Mustard has the highest oil content among India’s nine main oilseeds, including soybean and groundnut, but crop yields have been stagnant over the years.
India, the world’s largest edible oil importer, meets over 70% of its cooking oil demand through imports.
In the fiscal year ending March 31, 2022, New Delhi spent a record $18.99 billion on imports of vegetable oils, prompting Prime Minister Narendra Modi to express concern about India’s rising vegetable oil import bill.