Tricky parent gift question

Ok, so I know to give my mother and father a gift but what about step parents on both sides?
I'm also having my grandmother walk down with my brother..do i give her a gift? Do I get my brothers gifts if they're not in the bridal party?

Of course I would love to give everyone gifts but would it be bad if I didn't?

I really think you just give BP gifts and parents. . as for steps. . I think thank you gifts are either bc

a) they are paying part
b) just to say hey thanks for raising me

so if you feel steps really fall into that category then give them something otherwise I don't think you need to. . same for grandmother. . tech you don't give gifts just bc they are walking down the aisle. . it's really BP, readers, parents. . .I think you're good. .