gawk 'BEGIN{OFS="\t"}
        $4 ~ /term|inter|first|single/ {
          print "ref|NT_006431.13|_3", "grail", $4, start=($7<$8 ? $7 : $8),
                                             end=($8<$7 ? $7 : $8), $12, $3, $10, $1;
        }' grailresults.txt |  \ sed 's/\.[0-9][0-9]$//' > grail.gff