• GN -General open
• GL- General for girl quota
• Bc-Backward caste open quota
• BCGL-Backward caste for girl quota

• For further queries feel free to comment.

Hello Subia Zaheer

They have very different meaning.
GnGl means Girl in the general quota
What is the GN GL rank on the UPSEE?
Two categories for reservation in UPSEE: followed more or less same everywhere.
1. Vertical (category)- SC/ST/OBC of UP
2. Horizontal (sub category)- FF/AF/HC or PWD/GL of UP
GN & GL stands for GENERAL & GIRL respectively.

BCGL means BC Girl Category

I hope it will help you.
Good luck.