Interactive Hand-Controller Menus - click on green button to Navigate
The Western Goto Limit determines how far pass the meridian that the Gemini-2 will do a flip.  It is calculated like this. Note that the Meridian is at 90°. The point of Meridian Flip = Western Safety Limit - Goto Limit.  An example is if you have the Western Safety limit set to 100° - The Western GoTo limit of 2.5° (default) you end up with a point of flip of 97.5°, or 7.5 degrees past the meridian. Any target selected that is past this will do a meridian flip.  Any target on the East side (Northern Hemisphere) will not do a meridian flip.

100° - 90° = 10° - 2.5° = 7.5°.
or 90° + 7.5° = 97.5° (point of flip)

Note: Safety Limits may not take effect until you power down and back up. That has been my experience, however the writer of the firmware says they take effect when set.