How can I return in a GTK function in C a list of characters with GSList?

Question

I need to save the path of each file contained in a folder
This is my code: void on_file1_file_set(GtkFileChooserButton *chooser){
GSList filelist;
printf("file name = %s\n", gtk_file_chooser_get_filename (GTK_FILE_CHOOSER(chooser)));
printf("folder uri = %s\n", gtk_file_chooser_get_uri(GTK_FILE_CHOOSER(chooser)));
printf("folder filenames = %s\n", gtk_file_chooser_get_filenames(GTK_FILE_CHOOSER(chooser)));
return filelist;
}