Reproduction steps:
1. Have at least a two monitor/display setup
2. Open the attached “IN-96214.zip” project
3. Drag the Editor Window to a secondary display
4. Open the “SampleScene”
5. Click on the “GradientObject” GameObject in the Hierarchy
6. In the Inspector, click on the Gradient bar to open the Gradient Editor
7. Observe both displays

Expected result: The Gradient Editor opens on the display where the Editor was
Actual result: The Gradient Editor opens on the main display

Reproducible with: 2022.3.59f1, 6000.0.41f1, 6000.1.0b9, 6000.2.0a6

Reproducible on: Windows 11
Not reproducible on: macOS 15.3.1 (M4 Max)

Note:
- Also reproduces with other Gradient Editors, for example, the “Color over Lifetime” in the Particle System