According to a report in Marca, one of the biggest sports magazines in Spain, Real Madrid has decided to sell Gareth Bale in the next transfer period.
The last game he was in the starting eleven was against Betis Sevilla. Although Real Madrid scored 4 goals while Bale was on the pitch, he didn't intervene in none of them. He played a very mediocre match.
Another clear sign that Zidane doesn't coun't on him was the fact that he wasn't in the starting line-up against PSG, which probably Bale himself didn't like at all.
Since he signed for Real Madrid he missed 78 games due to injuries, which makes about a third of all games. That makes it difficult for the staff to count on him.
His agent recently said, his value is at least as high as Neymar's: 222 m. I think that Real Madrid would be very happy if they get the 90m. back they paid for him, but even that would surprise me.
Edit: Source: Marca.com