My understanding is ticks and Tourette's are really two separate things. Ticks are a part of Tourette's but ticks can also occur without it.
I am assuming you are seeking medical care- what has your dr said?
What kind of ticks is your son experiencing?
How old? Any other things with it?
I know for young children they can out grow them.
I wouldn't worry too much- it is my experience that children can learn so many tools to deal with hurdles. And if he is under medical care (what ever that may be) be will learn the tools/skills he needs.
I have had children with fairly minor ticks and it was never an issue socially in our dc group
HTH!