How often and how long are the power cuts?
It may be worth investing in a small U.P.S to hold power to the gate controls
If this is the correct manual below, I can't see any settings that shouldn't normally be held in memory and no reference to loss of power.
The "decription gizmo" will only be a program presenting the settings in a slightly more user friendly view, and I supsect will hold a copy of your settings which can easilly be downloaded to your controller, saves scrolling through the menu with a button.