I think you'll find that most experienced Georgetown owners, including me, use Manual leveling exclusively.
Even after calibrating our 2020 GT5 jacks I did not like how Auto really jerks the coach around. It seems to "split the difference" on each adjustment and that results in the coach being higher than we like (less weight and less tire footprint on the ground). What I do now:
1. Turn on the panel and push Manual.
2. Using your level of choice (I use the LevelMatePRO system), see whether the front is the lowest or the rear is the lowest. I also use the Android app named Bubble Level by Gamma Play. I just set the phone on the kitchen counter between the sink and the stove top.
CAUTION: If the rear is lowest, that is a warning that the jacks may lift the rear coach tires off the ground, the tires where the parking brake is. Bad things will happen if you allow that, especially if there is any wind or rain. Closely evaluate whether repositioning the coach or driving each rear tire up on blocks is a better alternative. HINT: Yes, it is.
3. Push and hold the button for whichever end is lowest. Raise that end up until the coach is now either level front-to-rear or that end is a touch higher. I make it a touch higher because the next step will raise the other end a bit.
4. Push and hold the button for the other end until you just feel the coach move.
5. Walk outside to assure all four jack feet are on the ground and no tires are close to coming off the ground, especially the rears where the parking brake is.
6. Now level left-to-right and re-check that no tires are close to coming off the ground.
7. Turn the leveling panel off.
In Auto mode, if the panel is properly calibrated, the green LCI light will be solid green when level. In Manual mode (on ours), if the panel is properly calibrated, the green LCI light will be flashing green when level.
I always double-check with the the Bubble Level app. I can feel if the coach is much more than 0.5 degrees off-level, so I try to keep it within a half-degree both front-rear and especially left-right. I'll usually try to keep the front a bit high so rain water runs off the rear instead of the front.
NOTE: The jacks always move in pairs to avoid twisting the frame. That's also why there is only a Retract All function; to avoid twisting the frame.
LITTLE KNOWN FACT: When you are in Manual mode, the Retract All button does NOT perform a full retract. It just retracts all four jacks while you have your finger on the button. You may be able to make a minor correction this way.
NOTE: Lifting the front too high will also make the bottom entry step a lot higher. Many of us carry a large stepstool for those situations.
NOTE: Remember that your holding tank dumps are on the driver side. If you are higher on the driver side than the passenger side, even a bit, you cannot fully drain the tanks so they may fill faster than expected. That's because the holding tanks are far longer than they are high.
NOTE: With the LevelMatePRO system, it seems that as long as 4" or less is needed before extending the jacks, I can use the jacks without needing any blocks. FWIW, I do have RV SnapPads installed on all of my jack feet to give them a bigger footprint and to protect the flimsy metal used for the jack feet from bending. The RV SnapPads do add 1" to the bottom, so they're sort of like having a 1" block under each jack all the time.
2020 Georgetown GT5 34H5