No, “Do you leave the girls?” is not the same as “Are you leaving the girls?”. In Irish, the former sentence has a habitual aspect, while the latter sentence would have a progressive aspect — that is, “Do you regularly leave the girls?” (e.g. after taking them to the park, you typically leave them there while you go to purchase a newspaper) vs. “Are you leaving the girls now?” (e.g. so that you can get some sandwiches for them this time while they’re playing in the park).
An bhfuil na cailíní agat? means “Do you have the girls?”.
No, it should not.
An bhfuil tú ag fágáil na cailíní? - "Are you leaving the girls?"
An bhfágann tú na cailíní? - "Do you leave the girls?"
In both Irish and English the distinction between the simple present and the present progressive is clear and distinct. Some other languages don't make the same distinction.