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The systematic program of heterotic line bundle model building has resultedin a wealth of standard-like models (SLM) for particle physics. In this paper,we continue this work in the setting of generalised Complete IntersectionCalabi Yau (gCICY) manifolds. Using the gCICYs constructed in Ref. [1], weidentify two geometries that, when combined with line bundle sums, are directlysuitable for heterotic GUT models. We then show that these gCICYs admit freelyacting $\mathbb{Z}_2$ symmetry groups, and are thus amenable to Wilson linebreaking of the GUT gauge group to that of the standard model. We proceed to asystematic scan over line bundle sums over these geometries, that result in 99and 33 SLMs, respectively. For the first class of models, our results may becompared to line bundle models on homotopically equivalent CompleteIntersection Calabi Yau manifolds. This shows that the number of realisticconfigurations is of the same order of magnitude.

Heterotic Line Bundle Models on Generalized Complete Intersection Calabi Yau Manifolds