Oh, I can related to this issue well. Both my husband and I were raised Catholic. From generations of Catholics before us! My parents were and continue to be cultural Catholics. Actually DH's parents are that way too. They participate in their church community but are not literal practicing Catholics.

Anyway, in looking for somewhere to marry we found a UU church (Unitarian Universalist). We were really just looking for a building. My DH is divorced and I was quite opposed to buying off the Catholic church for an annulment (his first marriage was a young, short, no kids marriage). But we found a community where we be involved without any particular dogma, pulling our "cultural Catholcism" along with us.

What has been a particularly good fit is the Sunday school program. It is designed to get kids thinking and asking questions, and works great for GT kids (very open ended). This has been an excellent solution for us. The kids get exposed to all major religions respectfully.