Dell X1000 GUI? Need to set up default gateway to reach another subnet.

I am currently working with a Dell X1000, im not too familiar with these models. I am trying to add a default gateway so these switches can reach my NMS subnet.

From what I've read, I need to go into the GUI and enable layer 2+ routing. This requires a reboot which i was trying to avoid

For anyone familiar with these switches. Can i just edit the mgmt vlan in the GUI and add a default gateway this way? Will it still not reach the 10.X.X.X network because layer 2+ isn't enabled?

Not too good with these GUIs. Anyone who's familiar with these switches, can you help clarify?

Thank you!