Can I get Odometry data using GPS and IMU only? (For SLAM!)

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Good morning. Nice to meet you. I'm leaving my first question to this community. I'm a newbie to ROS and SLAM, and I'm sorry that I'm asking you such a rudimentary question.

I am currently trying to use the Gmapping SLAM package. So I need Odom data for this.

However, currently I don't have sensors like Encoder, so I have to use IMU and GPS only. Is there a way to get Odometry data using only these two sensors?

If it exists, which ROS package should I use?

I would really appreciate it if you could answer. I wish you all the best of luck when you read this article.

Thank you. - K