[R] GAM with Thin plate splines

[rkales@edu.uni-klu.ac.at]

Hello, I'm a student at the University of Klagenfurt / Austria and I 
need some help !
I have to predict 24 daily load-values.
Therefor I got a dataset with following colums:
24 past daily load-values
6  past daily temperature-values

My goal is to find a model (GAM with thin plate splines) in R.
I found the function "gam" in the R-library "mgcv", but it just fits 
one-dimensial splines.

So my question is, either if it's possible to modify this function, if yes
how, or if there is another function that gives me a solution ?

Please send me a mail, if you can help me !
Thanks