Can anyone give me advice on how they setup their accounts if they use Google for their emails?

We use some google group emails currently

Parts@

Install@

Service@

Support@

Currently they go to multiple people and we reply all to ensure we don't duplicate reply.

We are moving to Desk and I am trying to think how best to setup Desk.  I prefer to not create an actual email as that costs money per month.  Can I use the Gmail Group still, do a default routing redirect?

Basically just wanting to see what worked really well for others.

Thanks!