Hi

According to Joint admission counselling Delhi admission brochure , your state category will be the state from where you qualified your 12th examination so in this case you will be considered in 'Gujarat category' and therefore outside Delhi category.

Now the reservation certificate should be issued from the respective state/region in which the reservation is being claimed. In your case since you are under Gujarat category according to your 12th place of qualification your reservation certificate should be from Gujarat only.

For more on this refer admission brochure JAC 2021

https://www.google.com/url?sa=t&source=web&rct=j&url=https://jacdelhi.nic.in/webinfo/File/GetFile//%3FFileId%3D5%26LangId%3DP&ved=2ahUKEwiElKDs-NjzAhV-xzgGHQ4_Ap4QFnoECA0QAQ&usg=AOvVaw2itDbbphJA8EJoKoTr1Hah

Hope this answers your query!