I want to know about allowed attempts and age limit to apply for GATE entrance examination ??

There is no limit for attempting in GATE examination to get admission in post graduate engineering courses and there is no maximum age limit for GATE examination.

Gate Eligibility:
You have to passed a Bachelor Degree with holding (10+2) qualification.
And Master Degree Holders can also apply for Gate Exam

Age limit : No age limit ..

Application Fee:
General/OBC-NCL Male Candidates: Rs 1500
SC / ST / PD category Candidates: Rs 750
Women Candidates: Rs 750

Contact details :
Chairperson, GATE/JAM
IIT Kharagpur - 721302

Phone: +91 3222 282093
+91 3222 282094
+91 3222 282091
Fax : +91 3222 278243
E-mail: gate@adm.iitkgp.ernet.in