The Wales assistant boss believes the 24-year-old's imminent transfer to the Spanish capital will be good for the team and has no doubts about his commitment to the national side
The 24-year-old is reportedly close to sealing a transfer to the Spanish capital in a deal that could be worth as much as £93 million, though sources have told Goal that Spurs chairman Daniel Levy is holding out for £100m.
Although the transfer, which would eclipse the current £80m record held by Cristiano Ronaldo, is yet to be confirmed, Madrid's official online shop prematurely made Bale shirts with number 11 available to buy, and Symons believes the transfer will be great for Wales.
"Having the world's most expensive player in the red shirt of Wales has to be fantastic for everyone," Symons told BBC.
"Gareth is very committed to the cause as we saw at the Republic of Ireland game, where he wasn't fit but wanted to turn up and be part of it.
"We fully expect Gareth to be turning up for us and I am sure he would love to do that.
"Every game we have, when Gareth pulls that shirt on for us it is a big boost for everyone because he is such a fantastic player."
Symons believes Bale will be able to cope without the pressures of being the world's most expensive player and playing for one of the world's biggest clubs.
"It will bring its own element of pressure but these top players - and Gareth is certainly one of them - thrive on the pressure," he added.
"I don't think it will be a problem for him at all.
"He is a very down to earth and level-headed lad and just wants to get out there and play football.
"When you are in that environment, the changing room is almost like a sanctuary for players. They are with like-minded people and soon settle in and get to know a few of the boys."