Hello,
.
There are no upper limit to attempt nor for age in GATE examination.
.
Here is the eligibility details for GATE examination,

• Candidates belonging to India as well as abroad are allowed for exam
• Candidates must hold a graduation
• There is no age limit
• There are no attempting limitations

In the same way every course has its own eligiblity like,

• For B.arch one should have 5 years bachelor degree in architecture
• For B.sc and BS one should have 4 years degree in science or post diploma in science

Same like mentioned above every course has has different eligiblity.
Here I am providing you a link which gives you a brief detail about the documents to be uploaded as well as dates of examination

https://engineering.careers360.com/articles/gate-eligibility-criteria

please refer it for more relevant information.
Thank you

Hey there

There is no restriction on number of attempts for gate exam but there are many PSUs which has age limits and it varies for different PSUs.

Check eligibility for gate

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/gate-eligibility-criteria/amp&ved=2ahUKEwjagcnk2IrlAhXKfH0KHZBmDHQQFjAAegQIBRAE&usg=AOvVaw1udu7YYL_zKa8I_bkLpLEy&ampcf=1&cshid=1570470096280 good luck

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