Gargi college is an all girls college and hence have no admission for boys. It is one of the reputed collge of south campus and usually have  high cuttoffs even for the reserved category. Even if you belong to OBC category you won't be able to get in any college of DU. The cutoffs for bcom in gargi college usually closes down at 86-87% for OBC category.

I'll suggest you to try in other colleges and universities infact. 

Good luck!