How to export a fit done with gam in R?

Is there any way I can export a fitting performed with gam?

fit <- gam(y~s(x1)+s(x2), data = data)

I want to use the function in C or Python but I don't know if this is possible.

I know I can get the coefficients fit$coefficients but I don't know anything about the smoothers s(x1) and s(x2).

Second, can I do a fitting this way?

fit <- gam(y~s(x1)+s(x2)+s(x1/x2), data = data)

via Chebli Mohamed