As my Company is registered in HUF PAN, name of kartha in pan is different from Aadhar name. So I am unable to key validation. What to do? Also, is caution money mandatory to be paid in gem?

We would like to inform you that for verifying the key person details, you need to enter the name of person whose name is written in ITR record as key person. Key person will only verify if name of key person is same in ITR & Aadhaar card.

And for you for your second concern, "YES" caution money is mandatory because without pay caution money you are not able to upload the catalogue at GEM.

Source: This answer is provided by GeM Helpdesk.