I would strongly suggest that you do not leave out your grade from your CV. As a screener and a recruiter, I can tell you that a lower GPA CV is much better than a no-GPA one - it builds trust that you are not hiding anything. Trust is crucial for the start of any relationship - especially professional ones. If you do not provide your GPA, you are forcing the interviewer to focus on this specific point, whereas it could be just one of the talking points among many others during your interview.
Secondly, I don't think you need to convert your GPA to a 4-point scale. Leave it at a 10-point scale and back it up with strong points on your CV. Don't be defensive in your interview for a low GPA - instead, you should focus on what all you achieved while managing a decent GPA in your academic career.
I can review your CV as well as prepare you for an interview if you need the same. Feel free to get in touch. All the best!!