All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
The Names of Allaah The Almighty should be respected and honored whether they are written in Arabic or in another language. If the words in the question mean "Allaah bless...", then it is impermissible to write them on a place where they may be exposed to disrespect, where filth and impurities may reach them for example. Hence, it is obligatory to object to anyone who does that.
Of course, if a Muslim writes the words "God bless...", then he actually means "Allaah bless...".
Allaah Knows best.