"I committed on my visit," said Grimes, who helped lead his team to state championship.
"I would rate my trip a 10 and I loved the whole environment. I went out with my host Lorenzo Booker, B.J. Dean and (Kyler) Hall."
Grimes, who was also considering Michigan State and Virginia Tech, will not take any more official visits.
"I'm done," he said. "I've always been a Florida State and I had to take my chance. My mother is supporting my future so she has no problem with the distance."
The Michigan native is being recruited by the Noles to play both wide receiver and running back.
This year as a senior, he rushed for approximately 600 yard and 700 yards receiving respectively.