Graded extensions of generalized Haagerup categories

We classify certain $\mathbb{Z}_2$-graded extensions of generalized Haagerup categories in terms of numerical invariants satisfying polynomial equations. In particular, we construct a number of new examples of fusion categories, including: $\mathbb{Z}_2$-graded extensions of $\mathbb{Z}_{2n}$ generalized Haagerup categories for all $n \leq 5$; $\mathbb{Z}_2 \times \mathbb{Z}_2$-graded extensions of the Asaeda-Haagerup categories; and extensions of the $\mathbb{Z}_2 \times \mathbb{Z}_2$ generalized Haagerup category by its outer automorphism group $A_4$. The construction uses endomorphism categories of operator algebras, and in particular, free products of Cuntz algebras with free group C$^*$-algebras.