Legally, yes. I think the governor will have it removed anyway. If a judge tells him not to, he will ignore the order.
The deed may specify that if the monument is not treated in accordance with the deed the piece of land reverts to the family. If so, the governor will probably let that happen.
Since when do laws, rules, property and the like mean anything to progs?
If he attempts to remove it, he's in breech, and the property is no longer the state's. It immediately returns to the descendants of the family, who won't remove it.
So no, he's checkmated regarding removal.
Fine.
The the family can put up a bigger, shinier statue of General Lee, perhaps holding a Confederate battle flag, with other bronze Confederates: Generals Jackson, Early, Pickett, Hood, and Longstreet.
Make sure it is heavily guarded by security.
And then the family can put up the monument again ( on their reclaimed land)