OGS v1.2 was mapped to genome assembly Clec_2.1 (https://www.ncbi.nlm.nih.gov/assembly/GCF_000648675.2) using https://github.com/NAL-i5K/coordinates_conversion and subsequently https://github.com/NAL-i5K/remap-gff3, resulting in OGSv1.3
The full OGSv1.2 dataset is accessible at the Ag Data Commons: https://doi.org/10.15482/USDA.ADC/1196762
The full datasets for OGSv1.2 and OGSv1.3 are accessible at VEuPathDB: https://vectorbase.org/common/downloads/Legacy%20VectorBase%20Files/Cimex-lectularius/
Additional information about OGSv1.3 is accessible at VEuPathDB: https://nov2020-metazoa.ensembl.org/Cimex_lectularius/Info/Annotation/
Official Gene Sets OGSv1.1 and OGSv1.0 were never publicly released.