What you will need to do is make a decision to either use an extension like Adobe Analytics in Launch or do it with raw code. There are advantages to each and it really depends on the granularity of control you are seeking to have.
Some things to consider:
What is the business reason for GA and AA at the same time? This may help in designing your set up.
Are you trying to get 1 to 1 data? Will you be using GA and AA as your analytics of record or will you use one for different purposes?
Do you have GA360? Since you are quite limited with basic GA and will not get the same level of data compared to AA.