basically I want to gift a girl that has helped me throughout a lot of problems in my life and she already did something that I always wanted her to do before like a month or so when she spoke with me and helped me with a problem. Now I really want to give her a gift but at the same time I want to ask her to help me with another problem but in a more polite way would that work? assuming that am going to ask her very politely

Yes. Sounds good.

do you think that would be rude i mean the way that i give her a gift in return of a help from her? I really don't want her to reject this gift and make her mad and another thing i wrote some good words in a card so she can read it when she opens the gift do you think that saying these words by myself is better or letting her to read it?

do you think that would be rude i mean the way that i give her a gift in return of a help from her? I really don't want her to reject this gift and make her mad and another thing i wrote some good words in a card so she can read it when she opens the gift do you think that saying these words by myself is better or letting her to read it?
Say a personal thank you as you hand her the card and gift. Smile.

thank you @Wondergirl have a great day!