You are able to get Google Maps into OMSI 2 which is up-to-date within the last year. However, Google Maps only provides 256px imagery which is inadequate for any detail and is difficult to distinguish roads.
Bing Maps provides your a full 2048px image which is great for tracing roads which is what I use. To use this feature you need to go to the Bing Developer centre and obtain an API key. The only problem with Bing Maps, that I found, was that it is quite out-of-date. Especially for the area I'm working on is Bing is 6 years older than Google Maps.
Take your pick, but that tutorial explains it all.