Can I throw out a plaque written by a goy with G d spelled with an O part of a Catholic poem ?
It is permitted to throw it out and it does not have to be put into shaimos. Although many poskim say that we should not say the word G-d, nevertheless when it is written it doesn’t have the same kedusha. There are poskim however who say that it one should still not throw out papers that have the word G-d spelled out, in an embarrassing way. When it was written by a gentile however there is even more room to be lenient, therefore you can just throw it out..
M”B: 85-10, Ginzei Hakodesh 7-12, Horav Y. Cahen shlit”a