# How to reproduce this font?

I am unable to reproduce the following font/style in a tikz picture:

This is my code

\documentclass{standalone}
\usepackage{tikz}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{newtxtext, newtxmath}
\usepackage[mathcal]{euscript}

\begin{document}
\tikzstyle{block} = [draw, rectangle,
minimum height=3em, minimum width=3em]
\centering
\begin{tikzpicture}
\node [block] (A) {$\mathbf{G}_{\mathcal{IP}}+\mathbf{u}_{\mathcal{F}}\mathbf{G}_{\mathcal{FP}}$};
\end{tikzpicture}
\end{document}


which generates

How to fix this?

Update: without euscript:

• Get rid of \usepackage[mathcal]{euscript} or at least get rid of [mathcal] – Steven B. Segletes Feb 11 '17 at 0:26
• It changes the font but still different from the one in the question. I could not upload the image due to the reputation limit. – user125098 Feb 11 '17 at 0:32
• The subscripts look like Zapf Chancery – David Carlisle Feb 11 '17 at 0:51
• Thanks @DavidCarlisle I noticed that as well. But how to change it? – user125098 Feb 11 '17 at 0:57

the subscripts look like Zapf Chancery, there are several clones of that available with TeX setup, perhaps

\documentclass{standalone}
\usepackage{tikz}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{newtxtext, newtxmath}
\usepackage{urwchancal}

\begin{document}
\tikzstyle{block} = [draw, rectangle,
minimum height=3em, minimum width=3em]
\centering
\begin{tikzpicture}
\node [block] (A) {$\mathbf{G}_{\mathcal{IP}}+\mathbf{u}_{\mathcal{F}}\mathbf{G}_{\mathcal{FP}}$};
\end{tikzpicture}
\end{document}


Replaced euscript with \usepackage[cal=zapfc]{mathalfa}