I don’t know how to advise you between pharmacy and CS. You should know that the workload for CS is pretty difficult. If you haven’t done any programming yet then its probably best to think of this as in interest and not a firm plan. You asked about what gpa they consider; I think your gpa is from all the transferable classes you have taken, not just the ones at DeAnza.
My advice is to treat your 1st year as an exploration. Start on the CS track, but also look into Pharmacy. I knew someone who worked at a drugstore (Longs or something like that) and ended up working in the Pharmacy dept. Getting 1st-hand exposure is a good idea before committing to something, whether it be CS or Pharmacy or something else. Impulsive decisions are seldom good ones.
The first week you show up at DeAnza, start using the resources there to help you. They have a career center, you should start working with a counselor and attending their workshops. They also have a transfer center; same story there; become a regular visitor. UC and CSU schools regularly send counselors around to CC, you should meet with them and double-check what your xfer advisors have said; sometimes they have it wrong, sometimes you can misunderstand.
Lastly, unless financial reasons compel you to stay local, don’t focus on UCSC just yet. There are lots of other UCs. And for that matter there are good CSU schools too.