Please ask her where is she going over the victoria day week-end and is her boyfriend going to but don't tell her that I ask for the informations.
1. Embedded question: when a question clause (one introduced by a question word) is within a longer clause, then use sentence word order unless you change to direct speech and use quotation marks. If the latter, then you also need to change “she is” to “you are”.
2. Word usage: “over” in this usage is slang; it’s better to use “for”.
3. Word form: “weekend” is one word—no hyphen.
4. Capitalization: Victoria Day is a proper noun; it needs capital letters.
5. Wrong word: Unless you are using direct speech, then change “is” to “if”.
6. Word confusion: “too” meaning “also” or “as well”, not “to” the preposition.
7. Verb tense: “I ask” is not appropriate: change it to the simple past (I asked), the present progressive (I am asking), or the present perfect (I have asked).
8. Word form: information is a non-count noun; there is no plural form.
9. Internal punctuation: There are several ways of doing this. The simplest is to use a comma after “too” to separate the two independent clauses.
Possible Answer: Please ask her where she is going for the Victoria Day weekend and if her boyfriend is going too, but don’t tell her that I asked for the information.