I'm pretty sure these are the correct root notes, though the chords he plays may be slightly different. I try to stay away from the notes on the bottom three strings for the minor 7th chords. You can play it with these chords in standard tuning, but Sting plays it in drop The angel Gabriel from heaven came His wings as drifted snow, his eyes as flame, All hail said he, thou lowly maiden Ma--ry Most highly favored lady Glo--oooo--ria Glo--oooo For known a blessed mother thou shalt be All generations laud and honor thee Thy Son shall be Emmanuel, by seers foretold Most highly favored lady. Glo--oooo--ria Glo--oooo Solo Then gentle Mary meekly bowed her head To me be as it pleaseth God, she said My soul shall laud and magnify his holy name Most highly favored lady Glo--oooo--ria Glo--oooo
https://lyrics.primanota.net/sting/gabriels-message.htm