GST inout Eligibility query.....

First of all whether the Government employee can do any other businesses ????
2ndly yes the ITC is available on the Asset if it is exclusively used in for making Taxable Outward Supply .

Mr. X  is a docter in private hospital and he received amount as salary , he also have income from youtube channel (adsense), this salary is taxable under the head income from salary in income tax, but his youtube income is taxable under the head income from other sources in income tax, he also purchased some fixed asset for you tube channel, then Mr. X can claim input on such fixed asset?, is any relationship between income chargeble under the different head of income tax and GST input?