Hi everyone!! This is Gray's sister, Berkeley. I will be keeping you all updated on Gray's mission adventures. Here is his MTC address and his email address. 

MTC:
Elder John Grayden Anderson
Provo Missionary Training Center
2005 N 900 E
Box 144
Provo, UT 84604
United States

Email:
john.anderson@myldsmail.net

If you want to send him letters, doing it through dearelder.com is the easiest way.

He said he would love lots of letters and emails from the world outside of the MTC. Since everything around him there is all Spanish, he loves reading the English letters because it is something he can understand!(:
(His P days are on Fridays)