GATE 2026 Answer Key Objection Window Activated: Submit Challenges by Feb 28 via GOAPS: GATE 2026 Answer Key Challenge Live: The Indian Institute of Technology Guwahati has officially commenced the GATE 2026 answer key objection process from February 25. Candidates who appeared for the examination can now review the provisional answer key and submit objections within the stipulated deadline of February 28. To file a challenge, aspirants must log in to the GOAPS portal using their enrolment ID and other required credentials.