23 year old student child 709

Hi there, My son is 23 year old student and doing his masters in Europe. He is not working and hence has no income. Other than paying tuition directly to his college, I transferred some money to his account (around $100k) for his expenses and to build his career.. Should I be filing 709 as it is not directly for tuition? I am claiming him as my dependent on my taxes. Thanks in advance for your advice!