[Blender Python] Here is a way to flip the two edge stops on a color ramp (video explination here https://www.skool.com/cgpython/how-to-flip-a-color-ramp?p=38e4ac8e)

simple_flip_geonodes_color_ramp.py

import bpy

class OBJECT_OT_FlipColorRamp(bpy.types.Operator):
    """Flip Color Ramp Elements"""
    bl_idname = "object.flip_color_ramp"
    bl_label = "Flip Color Ramp"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):
        try:
            geo_nodes_modifier = context.active_object.modifiers.get('GeometryNodes')
            if not geo_nodes_modifier:
                self.report({'WARNING'}, "No Geometry Nodes modifier found!")
                return {'CANCELLED'}

            color_ramp_node = geo_nodes_modifier.node_group.nodes.get('Color Ramp')
            if not color_ramp_node:
                self.report({'WARNING'}, "No Color Ramp node found!")
                return {'CANCELLED'}

            elements = color_ramp_node.color_ramp.elements
            if len(elements) < 2:
                self.report({'WARNING'}, "Not enough elements to flip!")
                return {'CANCELLED'}

            r, g, b, a = elements[-1].color
            elements[-1].color = elements[0].color
            elements[0].color = r, g, b, a

            self.report({'INFO'}, "Color ramp flipped successfully!")
            return {'FINISHED'}

        except Exception as e:
            self.report({'ERROR'}, f"Unexpected error: {e}")
            return {'CANCELLED'}


class GEONODES_PT_CustomPanel(bpy.types.Panel):
    """Custom Panel in the Geometry Nodes Editor"""
    bl_label = "Custom Tools"
    bl_idname = "GEONODES_PT_custom_panel"
    bl_space_type = 'NODE_EDITOR'
    bl_region_type = 'UI'
    bl_category = "Custom Tools"

    def draw(self, context):
        layout = self.layout
        layout.operator("object.flip_color_ramp", text="Flip Color Ramp")


classes = [OBJECT_OT_FlipColorRamp, GEONODES_PT_CustomPanel]

def register():
    for cls in classes:
        bpy.utils.register_class(cls)

def unregister():
    for cls in classes:
        bpy.utils.unregister_class(cls)

if __name__ == "__main__":
    register()