A word of advice if you truly want people to keep helping you: you might want to stop using phrases/words such as "the untold story", "people rumoring" - just go straight to your question or simply state whatever it is you find personally confusing.
All LPR and USC are eligible to apply for government sponsored education financial aids and grants. This is typically done through FAFSA and Pell Grants application based on demonstrated financial needs. You will need to do more than calling the financial aid office of your prospective school. Spend some time going through their financial aid website, and follow up with a visit to the school itself and speak with a financial aid advisor face to face.
For instance Arizona State University's website has some useful information as a starting point:
https://students.asu.edu/scholarships/resources/other
FAFSA
https://fafsa.ed.gov/
PELL Grant
https://studentaid.ed.gov/sa/types/grants-scholarships/pell
The one year stay in a state 'rumoring' you're talking about possibly has to do with meeting the State's residency requirements before qualifying to pay in-tuition fee. Has nothing to do with a PELL grant award which by the way is basically free money from the government to study - it is not a loan, doesn't need to be paid back - bear in mind though, it however may not cover your entire fees, and it is only awarded based on a demonstrated financial need basis.