The arrow to the right of the biome list (the tree icons) for the JEI info about the lenses switches to different weights & depths for the different biome sets. You likely need to check which biome you're in and find the relevant entry for gold ore. Then configure the drill within the range for that biome. I usually chose a depth near the lower number as the rates are likely highest there. Also, it might be good to understand which items you can avoid by checking their depths and seeing which range focuses most on what you need vs the rest. All of the entries should be in the yellow lens JEI entry. So, flip through the ores with the top arrows just above the entry and then flip through the bottom arrows to see the different depths and biomes you match with.