What Makes A Valid Gi List?

Hello all, I cannot figure out what makes a "correct" GI list!

Atm I have a list that I produced this using the query below and a awk line to just retrieve the second column values

blastn -word_size 11 -reward 2 -penalty -3 -gapopen 5 gapextend 2 -query hiv_reference.fa -db test -outfmt 6 >results.txt

awk "print $2" results.txt > giResults.txt

G3ME69S02DME82 G3ME69S02EPWTE G3ME69S02DE0PT G3ME69S02C1ABI G3ME69S02EQ3LK G3ME69S02ELVHG G3ME69S02CY21D G3ME69S02D9A53

So that is what I get from running those two lines, and from what I understand those are GI values, so why can I not do

blastdb_aliastool -gilist giResults.txt -dbtype nucl -db test -out test_subset

I get an error that its not a valid GI list.

Any ideas?

Any input is much appreciated