Here is a screen capture after swapping in renamed @bjpcorp PNG files…
the shadows might be a bit too pale/transparent :
gramps-geo-mainmap.png Green pin
gramps-geo-altmap.png red pin
gramps-geo-birth.png (+)
gramps-geo-death.png (-)
gramps-geo-marriage.png (x)
in Windoze, a properly scaled pin with the standardized name should have been dropped into these folders (I just stayed with the 48x48 so Gramps scaled them instead.):
C:\Program Files\GrampsAIO64-5.1.5\share\gramps\images\hicolor\16x16\actions
C:\Program Files\GrampsAIO64-5.1.5\share\gramps\images\hicolor\22x22\actions
C:\Program Files\GrampsAIO64-5.1.5\share\gramps\images\hicolor\24x24\actions
C:\Program Files\GrampsAIO64-5.1.5\share\gramps\images\hicolor\48x48\actions
The set did not include the SVGs yet. So these were left unchanged:
C:\Program Files\GrampsAIO64-5.1.5\share\gramps\images\hicolor\scalable\actions
gramps-geo-mainmap.svg Green pin
gramps-geo-altmap.svg red pin
gramps-geo-birth.svg
gramps-geo-death.svg
gramps-geo-marriage.svg
The originals in the Gramps project GitHub Repository:
https://github.com/gramps-project/gramps/tree/master/images/hicolor/scalable/actions