Advance Amount Received

If it is for service then gst must.

Yes gst is leivable on advance amount received
You have to calculate tax on advance and pay tax while filing the return for the month.

The advance received should be grossed up. This means that advance received is considered inclusive of GST.

When the rate of tax cannot be determined during receipt of advance GST @ 18% has to be charged.

Also if the point of sale cannot be ascertained the advance is considered as interstate supply and IGST has to be paid.