Through which aid program are you expecting to get your tuition at DeAnza approved?
I currently don’t know of any aid offered for out-of-state students and the only only loopholes around this (that I know of) requires that you either graduated from a CA HS or are a recent green card immigrant.
For residency purposes, the gap year must be taken before any educational progress is made within California…so taking the gap year after completing the transfer requirements won’t help at all. That said I have to defer to other posters for the specifics on this as having your biological father as a CA resident despite being claimed dependent elsewhere complicates things (in a way that is advantageous to you.)
It’s important to understand though that the CCC residency determination is very different than the UC determination. You should schedule a meeting with a UC representative as they will give you the most correct information regardless of what DeAnza, or anyone else for that matter, says.
Technically yes, although for CS, your major GPA will be the main focus of their admissions review so a bunch of easy classes doesn’t necessarily help your cause.