I give him a B+ because of the O-line and DB situation, the way it looked in weeks 1-4. Since then, we have gotten some consistency, but I'm not ready to give Gettleman credit for that. However, if we do beat ATL and we get to 5-3 for the first half of the season, I think the grade would bump up to an A-.
I know the GM isn't directly involved in game planning, but if we get to 5-3 and stay in the heat of that wildcard race, I think Gettleman gets a lot of the credit. I won't go into listing all of the moves he made that are upgrades (it has already been done in this thread to great effect). However, I will remind of a few players that are absolute keepers:
Just to name a few. Gettleman didn't just find role players to fill spots temporarily. He found actual starter caliber players (in draft and FA) that have raised the level of play for the whole team.