There is no workshop for this and the map requires no downloads. It is still cs office with a bomb site in the projector room and couch room and the spawn points are switched. I've converted this map on every version of counter-strike. I will take some more pictures and post them. I've also done this with cs_assault and some other maps and it makes a fun twist.
It is definitely still cs_office but the hostages have been removed and spawn points have been swapped. I have attached a few more pictures of de_office on cs go, cs source and cscz. There is also a picture of de_assault. I added map decals before using source mod to show bomb site locations and arrows and Lettera for each bomb site. I have also used meta mod to add props to cs office on cs source to make it look more like Office on cs go. The best part is players do not need to download anything!!