<gml:posList srsDimension="2">

<gml:posList>

ERROR 1: Did not get at least 3 values or invalid number of set of coordinates <gml:posList>205962.585 476394.629 205957.111 476398.377 205946.834 476405.243 205947.315 476406.680 205945.326 476407.938 205945.374 476407.563 205945.320 476407.086 205944.605 476405.688 205940.987 476399.969 205938.375 476395.992 205937.806 476395.734</gml:posList>

C:OSGeo4W64binogr2ogr -dim 3 -f "PostgreSQL" PG:"host=dbserver user=test password=test dbname=db" mygml.gml -dim 3 -overwrite -progress