Gildarts Glive- Edited part of S-Trial Arc details in which Chapter 234 had released. (similar reason for Bluenote)
Bluenote Stinger- Edited part of S-Trial Arc details in which Chapter 234 had released. Original synopsis stated Gildarts flipped a piece of earth upside down. After reading the chapter, it shows Bluenote motioning his hand to cast Gravity magic and Gildarts being caught off guard with the tilted land balance with an exclamation point. Therefore Bluenote intended on flipping the ground upside down to attack the surprised Gildarts from both the falling rock and Bluenotes fist, fortunately Gildarts countered by disassembling the rock and using it as leverage to launch himself at Bluenote.
Mmm..yup, just my take on things. Seems more reasonable than Gildarts lifting the ground beneath him just to go upside down.