。
She's definitely coming here.
Literal
She [topic-は] surely here [to-に] will-come.
A minimal-prediction structure: just きっと + a plain future verb. The に after ここ marks ここ as the destination, the same に used in school-textbook 'go to school' constructions (学校に行く). Without any auxiliary like だろう or でしょう, the prediction reads as a flat assertion of confidence — closer to English 'she's definitely coming' than 'she'll probably come.'