I have 5 & 3 months gap in my entire career, 5 months backpacking travelling, 3 months do nothing just resting at home during covid period, and it's not an issue at all, as long as you are competent.

But if you lie on your resume, it can be dangerous. The world is small, it will be easily to find out when your collogue/HR gossiping with the friends from the same industry, or known it from friend of friend...