The link to the Bed Bath & Beyond registry had been posted last week by The Washington Post.
According to the registry, Griffin and Rebecca Liddicoat are scheduled to be married on July 6.
The 23-year-old Griffin expressed his appreciation to his fans' surprise purchases in a tweet Sunday.
"Thank you to the Fans who are helping buy ALL the items from our wedding registry at Bed Bath & Beyond," he wrote.
He also included a photo of himself posing in front of several empty boxes in his tweet.
He later responded to apparent backlash he received by people who objected to the prospect of fans buying gifts for an NFL quarterback.
"I didn't ask the fans to buy me anything," he wrote.
"They found it on their own and decided to get what they could. SMH [shaking my head] at all these Debbie downers."
He also tweeted: "Because you are rich you are not allowed to receive gifts and any gifts you receive should be donated to charity???? #WOW Smh ..."