Hello Aspirant
No any 12 th or 10th board marks is necessary for Google internship . Any student of b tech , MBA , bba etc can do the internship . They have to apply for that . There is a minimum criteria skills are required for apply.
Thanks

Hello!
The thing is you can take or accept internship anywhere you want. There might me some eligibility criteria for sure for maybe some of the websites not all. For more details click in this link
https://buildyourfuture.withgoogle.com/internships/
Thanks and regards