Spelling of my sons name in the correct hebrew letters

Please follow the link to this thread as the explanation is there and it applies exactly to your situation. Though this is a Hebrew name but you need to be aware that the Hebrew language font cannot be duplicated here without first dowloading the font.
http://able2know.org/topic/122671-1

A similar type of question was asked and answered here. Check out this info and the link that is posted there for a full explanation of name transalations and Herbrew language script.

Furthermore, if I told you the Hebrew letters:
yod, aleph, koff, vov gimel resh shin nun

I'm not sure that is the answer for which you are asking. You will need to follow the previous link to see the Hebrew fonts themselves. This can't be displayed here.

יעקב גרשון
Ya'akov יעקב
Gershon גרשון