Vampire fan club?

Logic Level 1

$\begin{array} {ccccc} \large & & \color{#D61F06}F & \color{#3D99F6}A & \color{#20A900}N & \color{#69047E}G\\ \large + & & & \color{#D61F06}F& \color{#3D99F6}A & \color{#20A900}N \\ \hline \large & & 3 & 1 & 2 & 2 \end{array}$

Each letter represents a different nonzero digit. What is $G?$