says there's NO WAY Freddie Gibbs -- the rap star engaged to his daughter -- is guilty of raping a woman in Austria ... telling TMZ Sports he "supports Freddie 100%."
Gibbs was arrested earlier this month -- after two women reportedly claimed the rapper and his security agent drugged them after a 2015 show in Austria and raped them at Gibbs' hotel.
For his part, Gibbs has adamantly denied any wrongdoing and has vowed to fight the charges.
FYI, Freddie is a big name in rap -- having formerly been signed to Young Jeezy's CTE World record label, and been featured on songs with the likes of Gucci Mane, Action Bronson and E-40.