New to this, guide me for UI template query

Hello Authors, I am new here and I am thinking to design a UI template using Figma but I had one confusion as per Figma Template Requirements they mentioned “12 column grid with 30px of gutter”. so, is it compulsory to follow 30px gutter? or we can define it as per our requirements? Because I use multiple of 8px while design and Bootstrap 5 also mentioned 1.5rem(24px) gutter size.

So please guide me for the above-mentioned query.