Investigators said that the 34-year-old, whose real name is Quantavious Grier, was caught with a firearm, in violation of his probation terms.
The 24-year-old's death has been linked to the rare condition of eosinophilia.
A message threatening to "whack" someone played a key role in denying bond to Gunna. Having seen it, his attorneys now say prosecutors hoodwinked the judge.
