I watched a little of the TV coverage, missed him (if he even made it to the TV). Link below is the best I could find on him. Does not sound very positive. His 40 time - ouch. I would not have said that his arm strength was as poor as the scouts seem to describe.
https://www.nfl.com/prospects/gardner -minshew?id=32194d49-4e60-4610-dc98-dcddea9bb1f6
https://www.nfl.com/prospects/gardner -minshew?id=32194d49-4e60-4610-dc98-dcddea9bb1f6