 COLUMBUS, Ohio--BUSINESS WIRE--Installed Building Products, Inc. the Company or IBP NYSE: IBP, an industry-leading installer of insulation and complementary building products, announced today the acquisition of General Ceiling Partitions, Inc. GCP. Founded in 1986, GCP is headquartered in Colorado Springs, Colorado and primarily installs drywall, framing, ceiling tiles, and firestoppinginsulation for commercial customers. IBP also today announced the acquisition of Reliable 