How to use GASP with Custom Gravity in UE5.6

Im trying to use CustomGravity in GASP. I’m new to Unreal Engine, the first problem that occurred was that the character’s upper body remained perpendicular to the Z-axis. I found that the problem is caused by the OffsetRootBone node, while using the Accumulate mode, I use the Transform (Modify) Bone node to perform root bone rotation repair. It seems that PoseSearchSchema Trajectory Channel does not support custom gravity unnormal axis.Did I overlook something, or do I need to customize it