system
Given the following post, respond as if you're commenting on Reddit:
human
[Into the Spider-Verse] Why is Gwen enrolled at the private school?

Gwen is at the school before Miles gets powers. Not just there, but apparently enrolled and having a desk assigned.

Why was she at the school taking classes? Miles hadn't gotten powers, and it's a private school requiring enough tuition that Miles' parents are struggling. Also shouldn't there have been an application process/period to get in?

Why is she enrolled and taking classes, and how is she paying for it?
gpt
I have a few theories:   
1. she could have hacked her way in.  
2. She could have taken some other girl's place, potentially her  alternate universe self's (we don't know if that universe has a Gwen, only that Peter B. Parker's and her's did).  
3. Gwen may have had a connection in her own universe she exploited to get through the process - for instance, knowing enough black-mail material from one of her father's (Police Captain Stacy's) busts of a high profile individual to black-mail her way in.  
4. The school's security is absolutely terrible, and no one is watching for just another blonde girl. Spider powers make her a ninja, and she stole the uniform from the locker rooms or someone else's dorm.