Google maps in IE8 now appears to generally look like this (checked several machines):
I'm fairly sure it worked a few weeks ago. But googling for the problem only shows up a 2012 news item about Google withdrawing support for IE8. It has definitely worked more recently than that. But can't see any recent info on this topic.
Best Answer
Quoting from this Google support page:
When Google discontinued IE8 support in 2012, that was specific to Google Apps: Gmail, Google Drive, etc.
Also remember that dropping support does not necessarily mean "everything will break tomorrow".
My personal recommendation is to take Google's advice and "consider a dual browser strategy". Switch users to Chrome or Firefox and deploy apps specific for intranet sites, etc. that use an embedded IE control.