Your search for the postposition -gi at has returned 3 entries

-gi

Ałk’idą́ą́’ Diné bikéyah bikáa’gi łį́į́’ bichąą bíighahgo tł’oh deíl’áá ńt’éé’ jiní.

long.ago Navajo.land 3-upon-at horse 3-belly sufficient-GO Pl-3-extend.out.of.sight.SNP hearsay
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They say that long ago the grass in the Navajo country was as high as a horse’s belly. (YM 1987:6)

Sháahsita’gi yihę́ęsgo tsin-ts’ósí bee yích’id.

1-point.between.shoulder.blades 3-itch.I-GO stick 3-with 3-1-scratch.P
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When I got an itch between my shoulder blades, I scratched it with a stick. (YM 1987:1)