maybe. i remember this one time i had a dream i was at my nanie's house she wasn't feeling well so i hugged her, then she ran to the bathroom and threw up. i woke up and it was 2 am. a few days later i called her and we got to talking, and on the same day she wasn't feeling well, she had a dream that i came over and gave her a big bear hug, she woke up around 2 and ran to the bathroom and was sick. sometimes there's a strong spiritual connection we just know. got another story about my mom, a few days after my great grandad died she was on the beach alone picking out rocks for our fireplace [we had a stone mantel] and as she examined one she heard great grandad say 'you know that's not a good one donnie'. i don't know what it is, but sometimes you just know, it's a connection, i'd like to think spiritually, but some type of bond connects people.
i am sorry to hear about your grandfathers death.