Hey,
GAT for B.FTech and B.Des is a little different.

For B.Des , there will be 100 questions and duration will be 3 hours. No negative marking is there.The test will include questions from following topics:

• English comprehension (25)
• Quantitative ability (20)
• Communication ability (25)
• Analytical ability (15)
• General knowledge and current affairs (15)

For B.F.Tech , there will be 150 questions and 0.25 negative marking will be there for wrong answers.
Duration is 3 hours and the topics from which questions will be asked are as follows:

• Quantitative ability
• Communication ability and English comprehension
• Analytical and Logical Ability
• General Knowledge and Current Affairs
• Case study

For B.F.Tech, the admission will be completely done on the basis of GAT.
For B.Des, the admission will be done on the basis of CAT(50%) ,GAT(30%) and situation test (20%).

For more details check out the link below:
https://www.google.com/amp/s/design.careers360.com/articles/nift-exam-pattern/amp

Hope this helps!