I'm not religious personally but TGI Fridays is a very popular after-church spot (according to all of the religious/former religious people I asked). Why are none of them mad about this?
How could they actively support a restaurant so sinful it includes a sin in the title?
It’s not uncommon for some sects to write G-d instead of God as a handy workaround, and even then “God” is already a euphemism for the Tetragrammaton rather than His actual name. So in that vein using “G” on its own is probably safe.