When choosing your God Parents
Can be (2) God Parents, a male and a female, at least one of them must be a practising Catholic, having received all three (3) Sacraments of Initiation [Baptism, Eucharist and Confirmation] [Require Annotated Baptism Certificate]
If one is non-Catholic, but is a Christian, they would be a Christian Witness.
The God Parent(s) are to be living a life consistent with the faith. If married, must have been within the Church.