CytoGenix Inc. has hired GSL Constructors Ltd. for the design/build development of a 20,000-square-foot facility in Houston's Westchase District. The building will be on a 2.3-acre site in the Oak Park at Westchase office park and constructed by GSL's affiliate, Kingham Dalton Wilson. CytoGenix plans to occupy the building in the fourth quarter of 2007.