Hello student yes it'll be considered as a career Gap. Career Gap is period of time spent away from work to pursue interests or preparing for any examination etc.

But as you've obtained a decent percentile in CAT examination you can defend your career Gap in front of the panel its up to you.

If you want to re appear in CAT examination next year you can continue your preparation

For more details refer to the link mentioned below - https://bschool.careers360.com/articles/how-prepare-for-cat/amp

Feel free to comment if you have any doubt

Good luck