Gatsby and Next are React-based static site generator (to be precise, the latter can work as either server-side rendered web app OR export as static site).
Gridsome is a Vue-based static site generator.
As static site generators, they all output regular HTML, CSS, and JS. So as long as you follow SEO best practices in your code, your choice of tool would not affect your SEO.
As static site generators, they all output regular HTML, CSS, and JS. So as long as you follow SEO best practices in your code, your choice of tool would not affect your SEO.
Further references:
developers.google.com/search/docs/... (read the whole series)
technicalseo.com/seo-tools/schema-...
moz.com/blog/json-ld-for-beginners