A HANDWRITTEN letter penned by a disgruntled grandfather has proven that not all old folk are out of touch when it comes to equality.

The letter was written in response to his daughter, who kicked out his grandson after coming out of the closet.

"I'm disappointed in you as a daughter," he wrote.

"You're correct that we have a 'shame in the family', but mistaken about what it is."

Though details are unclear of the incident, he writes "kicking Chad out of your home, simply because he told you he was gay is the real 'abomination' here.

"A parent disowning her child is what goes 'against nature'".

He then decides to give his daughter a taste of her own treatment.

"While we are in the business of disowning our children, I think I'll take this moment to say goodbye to you.

"I now have a fabulous grandson to raise, and I don't have time for heartless B-word of a daughter."

Go gramps!

The letter became an online sensation after equality activist website fckh8.com posted it on their Facebook page, claiming it was "sent in by a supporter".

"We were blown away by how this guy stands by his grandson and stands up against his own homophobic daughter. This is real l♥ve!"

So far the post has received more than 3,000 shares.

Continue the conversation via Twitter @the_mattyoung | @FCKH8