Yup the only way out right now is a trade.
And..........for those thinking GZ should be released here is some relevant info. Very few guys have his range. He's not perfect, but he's excellent. He had a down year and I suspect he has a nagging injury.
From 57 yards away he put the Rams in the SB. Many coaches wouldn't have even tried because their kicker doesn't have enough power and they wouldn't want to risk giving Brees and the Saints excellent field position to kick their own FG to win. So on that 4th and 7 they would be giving the ball back to the Saints via a punt.
And he nailed a 48 yarder to tie at the end of regulation too.
This isn't a guy you cut loose. He can make it from 60 yards out. Those kinds of kickers are rarer than hen's teeth. At the end of a game he can get the win from a long way away. He won't make all of them but he makes more than most kickers.
Remember the 66 yarder versus the Dolphins that he missed? It didn't fall short, it was wide. How many kickers could do tat?
If he struggles next year then maybe it's time to move on, but not yet.