Yes, you can request a change in your exam center after the GATE ECE exam admit card is released. Here's how you can go about it:

1. Contact the Exam Conducting Authority:
If you wish to change your exam center, the first step is to contact the Exam Conducting Authority. They are responsible for managing the entire GATE examination process and will be able to guide you through the necessary steps.

2. Provide Valid Reason:
When requesting a change in your exam center, it is important to provide a valid reason for your request. This could include personal reasons, such as a change in residence or an unforeseen circumstance that makes it difficult for you to travel to the assigned exam center.

3. Check Availability:
Next, check the availability of seats in the desired exam center. The Exam Conducting Authority will be able to provide you with information on whether there are any vacant seats in the center you wish to change to. If there are no available seats, it may not be possible to change your exam center.

4. Submit a Request:
Once you have determined the availability of seats, submit a formal request to the Exam Conducting Authority. This can usually be done through their official website or by contacting their helpline. Make sure to provide all the necessary details, including your registration number, current exam center, and the desired exam center.

5. Follow the Instructions:
After submitting your request, carefully follow any instructions provided by the Exam Conducting Authority. They may require you to submit supporting documents or take additional steps to process your request. It is important to comply with these instructions to ensure that your request is considered.

6. Await Confirmation:
Finally, await confirmation from the Exam Conducting Authority regarding the status of your request. They will inform you whether your exam center has been changed or if any further action is required from your end.

Note: It is important to remember that changing your exam center is subject to the availability of seats and the discretion of the Exam Conducting Authority. Therefore, it is advisable to make the request as early as possible to increase your chances of a successful change.

In conclusion, while it is possible to request a change in your exam center after the GATE ECE exam admit card is released, it is important to provide a valid reason, check seat availability, submit a formal request, follow instructions, and await confirmation from the Exam Conducting Authority.