  We give an explicit geometric structures interpretation of the $G_2'$-Hitchin
component $Hit(S, G_2') \subset \chi(\pi_1S,G_2')$ of a closed oriented surface
$S$ of genus $g \geq 2$. In particular, we prove $Hit(S, G_2')$ is naturally
homeomorphic to a moduli space $\mathscr{M}$ of $(G,X)$-structures for $G =
G_2'$ and $X = Ein^{2,3}$ on a fiber bundle $\mathscr{C}$ over $S$ via the
descended holonomy map. Explicitly, $\mathscr{C}$ is the direct sum of fiber
bundles $\mathscr{C} = UTS \oplus UTS \oplus \underline{\mathbb{R}_+}$ with
fiber $\mathscr{C}_p = UT_p S \times UT_p S \times \mathbb{R}_+$, where $UT S$
denotes the unit tangent bundle.
  The geometric structure associated to a $G_2'$-Hitchin representation $\rho$
is explicitly constructed from the unique associated $\rho$-equivariant
alternating almost-complex curve $\hat{\nu}: \tilde{S} \rightarrow
\hat{\mathbb{S}}^{2,4}$; we critically use recent work of Collier-Toulisse on
the moduli space of such curves. Our explicit geometric structures are examined
in the $G_2'$-Fuchsian case and shown to be unrelated to the $(G_2',
Ein^{2,3})$-structures of Guichard-Wienhard.
