It looks like Yolo models are actually AGPL (addressed a few minutes ago here in a similar question), but re: GPL, here’s what the rules say:
OPEN-SOURCE CODE. A Submission will be ineligible to win a prize if it was developed using code containing or depending on software licensed under an open source license:
- other than an Open Source Initiative-approved license (see http://opensource.org/licenses); or
- an open source license that prohibits commercial use.
The GPL v3 is OSI approved and allows commercial use (with acceptable caveats for an MIT-licensed submission).