Gidle's Tomboy will be the #1 song in the yearly melon charts. Any songs released from now have too little time to catch up.
It is also likely to be the 'adjusted yearly #1' (songs released in a particular year, counted for 12 months) as well.
However, Cube is a weak company, and traditionally grand prizes were only given to the major companies.
Only Melon Awards gave Beast (now Highlight) a Grand Prize when it was not a major award.
Gidle will be due for the Song of the Year Award in all three. Jeon Soyeon's previous appearance at Produce 101 and Gidel's perf at Queendom 1 might help to endear it to MNet but whether it will be enough for a Grand Prize remains to be seen.
If Gidle pulls it off, it will be the first group win for a non Big 4 act. However aespa will release its album, so Gidle will have to maintain a huge distance with the new aespa song to win a Grand Prize.