I won't waste your time retelling the latest news about Libra and how it became non-welcomed among politics, banks, etc.
There's also TON project, which seems more acceptable among society, exchange platforms, communities, etc.
Comparing the feedback while Gram is 'delighted to be listed' by different exchanges (quote from
here), Libra's just... 'not money' (quote from
here).
So, could you explain, what's the difference between Libra and Gram and is there future for Gram coin?
Gram and Libra are different in the sense of their legality. Gram is as legal as any other cryptocurrency. i.e. most of the jurisdiction considers it as illegal and would be outright banned in the crypto oppressive countries like US and China.
Libra on the other hand wants to be a universally accepted legal currency. It wants to be the coin of Facebook platform.
Exchanges are delighted to accept gram but Libra would probably chose the exchanges that can accept it.