I'd hate it. Positional value aside, how often does MM throw to his running backs? I know Dak doesn't like to. We'd be reaching for a player and then wasting his best attribute, it's a bust pick from day 1.
Everyone says "he's just like Kamara!", and he is, but Kamara's best years came with a QB who targeted halfbacks relentlessly. Drew Brees got LT to 100 catches in San Diego, then threw like 60 balls a year to Reggie Bush, and when the best receiving back he had was Pierre Thomas, he threw a bunch of passes to Pierre Thomas. Adding Kamara had the Saints cooking with gas, but Brees' demand for a receiving RB had been there for 15 years at that point. Kamara just stepped into a well-established, high volume offensive role. Payton and Brees didn't have to change their offense to shoehorn him in, and they didn't just waste his receiving talent and only give him handoffs.
If we drafted Gibbs, we'd just stick him in the Pollard role and give him 10 handoffs and 2 catches a game. Total waste of his talent.
If you want an RB for this team, I'd go for Bijan or Charbonnet, guys that can be plugged into the Zeke role.